scholarly journals Versatile construction of a hierarchical porous electrode and its application in electrochemical hydrogen production: a mini review

2021 ◽  
Author(s):  
Zizai Ma ◽  
Hefeng Yuan ◽  
Jiaqi Sun ◽  
Jie Yang ◽  
Bin Tang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Transition Metal ◽  
Water Splitting ◽  
Rational Design ◽  
Porous Electrode ◽  
Porous Electrodes ◽  
Next Generation ◽  
Hierarchical Porous ◽  
Earth Abundant

The rational design of earth-abundant transition metal-based porous electrodes is of great importance for developing next-generation electrocatalysts for water splitting.

Fe-Co-P multi-heterostructure arrays for efficient electrocatalytic water splitting

2021 ◽  
Author(s):  
Hanwen Xu ◽  
Jiawei Zhu ◽  
Pengyan Wang ◽  
Ding Chen ◽  
Chengtian Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Rational Design ◽  
Large Scale ◽  
High Efficiency ◽  
Bifunctional Catalysts

Rational design and construction of high-efficiency bifunctional catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for large-scale hydrogen production by water splitting. Herein, by a...

scholarly journals Bottom-Up Synthesis of Porous NiMo Alloy for Hydrogen Evolution Reaction

2017 ◽  
Author(s):  
Kailong Hu ◽  
Samuel Jeong ◽  
Mitsuru Wakisaka ◽  
Jun-ichi Fujita ◽  
Yoshikazu Ito
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Annealing Temperature ◽  
Hydrogen Atmosphere ◽  
Porous Electrodes ◽  
Bottom Up ◽  
Annealing Temperatures ◽  
Oxide Phases

Bottom-up synthesis of porous NiMo alloy reduced by NiMoO4 nanofibers was systematically investigated to fabricate non-noble metal porous electrodes for hydrogen production. The different annealing temperatures of NiMoO4 nanofibers under hydrogen atmosphere reveal that the 950 °C annealing temperature is a key to produce bicontinuous and monorhinic porous NiMo alloy without oxide phases. The porous NiMo alloy as cathodes in electrical water splitting demonstrates not only almost identical catalytic activity with commercial Pt/C, but also superb stability for 12 days.

scholarly journals Covalent organic frameworks in Lieb lattice for tunable photocatalytic water splitting under visible light

2021 ◽  
Author(s):  
Hongde Yu ◽  
Dong Wang
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Active Sites ◽  
Rational Design ◽  
Near Infrared ◽  
Band Alignment ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Water Splitting ◽  
Metal Free ◽  
Lieb Lattice

Covalent organic frameworks (COFs) with highly designable skeleton and inherent pores have emerged as promising organic photocatalysts for hydrogen production. However, inefficient solar light harvesting, strong excitonic effect, and the lack of active sites still pose major challenges to the rational design of COFs for efficient photocatalytic water splitting and the structure-property relationship has not been established. In this work, we investigated the fundamental mechanism of photoelectrochemical conversion in fully conjugated donor (D)-acceptor (A) COFs in Lieb lattice and proposed a facile strategy to achieve broad visible and near-infrared absorption, prompt exciton dissociation, tunable band alignment for overall water splitting, and metal-free catalysis of hydrogen production. Interestingly, we found that the exciton binding energy was substantially reduced with the narrowing of optical band gap and the increase of static dielectric constant. Further, we unraveled that the hydrogen bond played a vital role in suppressing the overpotential for hydrogen evolution reaction to enable metal-free catalysis. These findings not only highlight a novel route to modulating electronic properties of COFs towards high photocatalytic activity for water splitting, but also offer tremendous opportunities to design metal-free catalysts for other chemical transformations.

scholarly journals Graphitic Carbon Nitride Materials for Photocatalytic Hydrogen Production via Water Splitting: A Short Review

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 805 ◽  
Author(s):  
Seong Jun Mun ◽  
Soo-Jin Park
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Rational Design ◽  
Carbon Nitride ◽  
Clean Energy ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Future Research ◽  
Metal Doping ◽  
Photocatalytic Hydrogen Production

The generation of photocatalytic hydrogen via water splitting under light irradiation is attracting much attention as an alternative to solve such problems as global warming and to increase interest in clean energy. However, due to the low efficiency and selectivity of photocatalytic hydrogen production under solar energy, a major challenge persists to improve the performance of photocatalytic hydrogen production through water splitting. In recent years, graphitic carbon nitride (g-C3N4), a non-metal photocatalyst, has emerged as an attractive material for photocatalytic hydrogen production. However, the fast recombination of photoexcited electron–hole pairs limits the rate of hydrogen evolution and various methods such as modification, heterojunctions with semiconductors, and metal and non-metal doping have been applied to solve this problem. In this review, we cover the rational design of g-C3N4-based photocatalysts achieved using methods such as modification, metal and non-metal doping, and heterojunctions, and we summarize recent achievements in their application as hydrogen production photocatalysts. In addition, future research and prospects of hydrogen-producing photocatalysts are also reviewed.

Reduced overpotentials for electrocatalytic water splitting over Fe- and Ni-modified BaTiO3

2016 ◽  
Vol 18 (42) ◽  
pp. 29561-29570 ◽  
Author(s):  
Nongnuch Artrith ◽  
Wutthigrai Sailuam ◽  
Sukit Limpijumnong ◽  
Alexie M. Kolpak
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Water Splitting ◽  
Water Oxidation ◽  
Water Electrolysis ◽  
Transition Metal Doping ◽  
Metal Doping ◽  
Earth Abundant ◽  
Promising Avenue

Transition-metal doping can significantly improve the catalytic activity of BaTiO3 for water oxidation. Modification of earth-abundant perovskites can be a promising avenue towards inexpensive catalysts for water electrolysis.

Defects as catalytic sites for the oxygen evolution reaction in Earth-abundant MOF-74 revealed by DFT

2021 ◽  
Author(s):  
Jordi Morales-Vidal ◽  
Rodrigo García-Muelas ◽  
Manuel A. Ortuño
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Atomic Level ◽  
Catalytic Sites ◽  
Earth Abundant

The oxygen evolution reaction (OER) is the bottleneck of hydrogen production via water splitting and understanding electrocatalysts at atomic level becomes paramount to enhance the efficiency of this process.

Janus CoN/Co cocatalyst in porous N-doped carbon: toward enhanced catalytic activity for hydrogen evolution

2018 ◽  
Vol 8 (14) ◽  
pp. 3695-3703 ◽  
Author(s):  
Meihong Fan ◽  
Yuenan Zheng ◽  
Ang Li ◽  
Kaiqian Li ◽  
Hanyu Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Noble Metal ◽  
Metal Catalysts ◽  
Noble Metal Catalysts ◽  
Earth Abundant

Using earth abundant transition metal-based compounds to replace noble metal catalysts towards hydrogen evolution from water splitting seems to have great importance worldwide.

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