ChemInform Abstract: Cross-Coupling Hydrogen Evolution Reaction in Homogeneous Solution Without Noble Metals.

ChemInform ◽  
2014 ◽  
Vol 45 (37) ◽  
pp. no-no
Author(s):  
Jian-Ji Zhong ◽  
Qing-Yuan Meng ◽  
Bin Liu ◽  
Xu-Bing Li ◽  
Xue-Wang Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Homogeneous Solution ◽  
Cross Coupling

Cross-Coupling Hydrogen Evolution Reaction in Homogeneous Solution without Noble Metals

2014 ◽  
Vol 16 (7) ◽  
pp. 1988-1991 ◽  
Author(s):  
Jian-Ji Zhong ◽  
Qing-Yuan Meng ◽  
Bin Liu ◽  
Xu-Bing Li ◽  
Xue-Wang Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Homogeneous Solution ◽  
Cross Coupling

Highly active electrocatalyst cobalt-carbide nanoparticles synthesized by wet-chemistry method for hydrogen evolution reaction

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040022
Author(s):  
Yi-Heng Lin ◽  
Po-Chia Huang ◽  
Sheng-Chang Wang ◽  
Jow-Lay Huang
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alternative Energy ◽  
Noble Metals ◽  
Triethylene Glycol ◽  
Promising Alternative ◽  
Wet Chemistry ◽  
Onset Potential ◽  
Chemistry Method ◽  
Cobalt Carbide

Hydrogen is a promising alternative energy without greenhouse gas emissions. The transition metal carbides (TMCs) are considered a sustainable alternatives to noble metals in catalysis. Among the TMCs, Co[Formula: see text]C ([Formula: see text] = 2, 3) nanoparticles (NPs) act as an excellent electrocatalyst for hydrogen evolution reaction (HER) by water splitting. In our report, Co[Formula: see text]C nanocomposites were synthesized by wet chemistry method using cobalt (II) acetate, sodium hydroxide as precursors and triethylene glycol as solvent. In addition, Co2C NPs were synthesized by similar wet chemistry method using cobalt (II) acetate as precursors and triethylene glycol, oleylamine as solvent. The cobalt carbide NPs exhibited high electrocatalytic activity. Co[Formula: see text]C nanocomposites performed a −0.33 V onset potential and 91 mV/dec Tafel slope, while the Co2C NPs exhibited a better performance of −0.27 V and 60 mV/dec, respectively.

A Cascade Cross-Coupling Hydrogen Evolution Reaction by Visible Light Catalysis

2013 ◽  
Vol 135 (51) ◽  
pp. 19052-19055 ◽  
Author(s):  
Qing-Yuan Meng ◽  
Jian-Ji Zhong ◽  
Qiang Liu ◽  
Xue-Wang Gao ◽  
Hui-Hui Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Cross Coupling

scholarly journals Defect and Doping Engineered Penta-graphene for Catalysis of Hydrogen Evolution Reaction

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Jinbo Hao ◽  
Feng Wei ◽  
Xinhui Zhang ◽  
Long Li ◽  
Chunling Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Noble Metals ◽  
Low Cost ◽  
Water Electrolysis ◽  
Catalytic Performance ◽  
First Principles Calculation ◽  
Electron Charge Density ◽  
Calculation Results

AbstractWater electrolysis is a sustainable and clean method to produce hydrogen fuel via hydrogen evolution reaction (HER). Using stable, effective and low-cost electrocatalysts for HER to substitute expensive noble metals is highly desired. In this paper, by using first-principles calculation, we designed a defect and N-, S-, P-doped penta-graphene (PG) as a two-dimensional (2D) electrocatalyst for HER, and its stability, electronic properties and catalytic performance were investigated. The Gibbs free energy (ΔGH), which is the best descriptor for the HER, is calculated and optimized, the calculation results show that the ΔGH can be 0 eV with C2 vacancies and P doping at C1 active sites, which should be the optimal performance for a HER catalyst. Moreover, we reveal that the larger charge transfer from PG to H, the closer ΔGH is to zero according to the calculation of the electron charge density differences and Bader charges analysis. Ulteriorly, we demonstrated that the HER performance prefers the Volmer–Heyrovsky mechanism in this study.

Laser assisted manufacturing of nanomaterials for energy conversion

2019 ◽  
Author(s):  
◽  
Chi Zhang
Keyword(s):  
Catalytic Activity ◽  
Fuel Cell ◽  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Fossil Fuels ◽  
Synthesis Method ◽  
High Efficient ◽  
Air Battery

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] With the rapid growth of global population and societal development, nonrenewable energy sources such as fossil fuels are being consumed at an alarming rate. Meanwhile, the environment is faced with a grand challenge due to the exploitation, processing, and utilization of these traditional fossil fuels. Therefore, it is of great importance to develop renewable and sustainable energy strategies, including energy storage and conversion. Among them, electrolyzer, hydrogen-based fuel cell and metal air battery have drawn much attention due to their high-efficient, renewability, environment-friendly. However, at present their performances highly depend on the noble metals based electrocatalysts which are not only scarce but also expensive. In order to lower the cost of abovementioned devices and facilitate their large-scale applications, it is necessary to develop high-efficient, low cost and stable electrocatalysts. So far, much effort has been devoted to developing earth-abundant element based electrocatalysts or lowering the use of the noble metals without compromising performance. These materials are developed by synthesis methods based on wet chemistry, which unavoidably involves tedious experiment steps, harsh reaction conditions, and costly capital investment. This dissertation focuses on investigating the laser assisted fabrication of nanocatalysts under ambient conditions, and exploring their applications in energy conversion, especially electrochemical water splitting. In contrast to traditional laser synthesis of nanomaterials in liquid or in vacuum which suffers from low yield and expensive experimental instruments, the developed CO2 laser based nanomanufacturing method has greater potentials for mass production. Chapter 1 introduces current challenges of electrolyzer, hydrogen-based fuel cell, and metal air battery as well as the proposed and demonstrated solutions. Much attention is paid to discuss merits and demerits of these solutions. Chapter 2 presents the synthesis of graphene from coal via one step laser scribing as multifunctional materials for joule heater, supercapacitor, an electrochemical dopamine sensor, and electrocatalyst. Next, Chapter 3 discusses the synthesis of laser induced MoS2/carbon and explores its catalytic activity toward hydrogen evolution reaction. In Chapter 4, a novel synthesis method of electrocatalysts has been reported by using polyimide derived laser induced graphene (LIG) as a microreactor and support. The obtained Pt/LIG and FeNi3/Fe3O4/LIG show superior catalytic activity toward hydrogen evolution reaction and oxygen evolution reaction, respectively. Benefited from the flexibility of the polyimide film and the simple synthesis method, a laser assisted roll to roll manufacturing method which is compatible with existing industrial protocols is proposed. Finally, in Chapter 5, by applying methodology shown in Chapter 4, supermolecules were explored as a novel precursor to produce electrocatalysts with much improved the catalytic activity.

Directly Synthesis of 1T-phase MoS2 Nanosheets with Abundance Sulfur-Vacancies through (CH3)4N+ Cations-Intercalation for Hydrogen Evolution Reaction†

2021 ◽  
Author(s):  
Hongqiang Jin ◽  
Yu Yu ◽  
Qikai Shen ◽  
Peipei Li ◽  
Jia Yu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Single Layer ◽  
Mos2 Nanosheets ◽  
Molybdenum Disulphide

1T-phase molybdenum disulphide (MoS2) is considered as one of the most promising candidates to substitute noble metals in hydrogen evolution reaction (HER). Fabricating single layer 1T-phase MoS2 with abundance sulfur...

scholarly journals STUDY ON SYNTHESIS AND CHARACTERIZATION OF ELECTROCATALYST CONTAINING PLATINUM, PALLADIUM, NICKEL FOR HYDROGEN EVOLUTION REACTION IN ALKALINE MEDIUM

2020 ◽  
Vol 63 (2) ◽  
pp. 52-58
Author(s):  
Nguyen Thi Cam Ha ◽  
Nguyen Huu Tho ◽  
Nguyen Van Thuc ◽  
Huynh Thi Lan Phuong
Keyword(s):  
Hydrogen Evolution ◽  
Alkaline Medium ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Linear Sweep Voltammetry ◽  
Water Electrolysis ◽  
Reversible Capacity ◽  
Alkaline Media ◽  
Carbon Substrate ◽  
Linear Sweep

Several kinds of electrocatalyst based on platinum, palladium, and nickel with glassy carbon substrate were successfully synthesized by electrodeposition method, and then applied for water electrolysis in alkaline media. Surface morphology of materials was investigated with scanning electron microscopy method. Energy-dispersive X-ray spectroscopy was used to find the content of each metal in bimetallic materials. The result showed that the number of noble metals was moderately decreased while the catalytic activities were slightly better than pure metal electrodes. Linear sweep voltammetry measurement was taken in KOH 1M solution to find the overvoltage of hydrogen evolution reaction and cyclic voltammetry method in 0.01M K3[Fe(CN)6]: 0.01M K4[Fe(CN)6] in 0.1M KOH was used to determine the reversible capacity of material electrodes. The linear sweep voltammetry measurements confirmed that the activities of new catalysts are higher than the origin materials. The binary catalyst of Pt-Ni can replace platinum for hydrogen evolution reaction in alkaline medium. Notably, the replacement of platinum atoms with palladium and nickel atoms, and the combination of good properties of them leads to improve the catalytic activity, and in the same time to decrease the catalyst cost. Once again, the electrochemical parameters open up a new prospect for the hydrogen produce.

Robust and highly active copper-based electrocatalyst for hydrogen production at low overpotential in neutral water

2015 ◽  
Vol 51 (65) ◽  
pp. 12954-12957 ◽  
Author(s):  
Xiang Liu ◽  
Shengsheng Cui ◽  
Zijun Sun ◽  
Pingwu Du
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Noble Metals ◽  
Catalyst Free ◽  
Highly Active ◽  
Neutral Water ◽  
Low Overpotential

A Cu(0)-based catalyst free of noble metals was used as an electrocatalyst in the hydrogen evolution reaction in neutral water with an onset overpotential of only 70 mV.

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