Ru single atoms and nanoclusters on highly porous N–doped carbon as hydrogen evolution catalyst in alkaline solutions with ultrahigh mass activity and turnover frequency

2021 ◽  
Author(s):  
Yijun Li ◽  
Huijing Liu ◽  
Bing Li ◽  
Zhenzhen Yang ◽  
Zhenguo Guo ◽  
...  
Keyword(s):  
Energy Source ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Active Sites ◽  
Sustainable Energy ◽  
Alkaline Solutions ◽  
Turnover Frequency ◽  
Single Atoms ◽  
Mass Activity ◽  
Highly Porous

Electrocatalytic water splitting is one of the most desirable ways to provide hydrogen which is a clean and sustainable energy source. Improving the formation and the exposure of active sites...

scholarly journals A Molecular Tetrahedral Cobalt–Seleno-Based Complex as an Efficient Electrocatalyst for Water Splitting

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 945
Author(s):  
Ibrahim Munkaila Abdullahi ◽  
Jahangir Masud ◽  
Polydoros-Chrisovalantis Ioannou ◽  
Eleftherios Ferentinos ◽  
Panayotis Kyritsis ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
High Mass ◽  
Alkaline Solutions ◽  
Hydrogen Evolution Reactions ◽  
Mass Activity ◽  
Turn Over Frequency ◽  
Turn Over

The cobalt–seleno-based coordination complex, [Co{(SePiPr2)2N}2], is reported with respect to its catalytic activity in oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solutions. An overpotential of 320 and 630 mV was required to achieve 10 mA cm−2 for OER and HER, respectively. The overpotential for OER of this CoSe4-containing complex is one of the lowest that has been observed until now for molecular cobalt(II) systems, under the reported conditions. In addition, this cobalt–seleno-based complex exhibits a high mass activity (14.15 A g−1) and a much higher turn-over frequency (TOF) value (0.032 s−1) at an overpotential of 300 mV. These observations confirm analogous ones already reported in the literature pertaining to the potential of molecular cobalt–seleno systems as efficient OER electrocatalysts.

scholarly journals Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Panlong Zhai ◽  
Mingyue Xia ◽  
Yunzhen Wu ◽  
Guanghui Zhang ◽  
Junfeng Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Density Functional ◽  
Rational Design ◽  
Single Atom ◽  
Nickel Iron ◽  
Double Hydroxide

AbstractRational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru1/D-NiFe LDH). Under precise regulation of local coordination environments of catalytically active sites and the existence of the defects, Ru1/D-NiFe LDH delivers an ultralow overpotential of 18 mV at 10 mA cm−2 for hydrogen evolution reaction, surpassing the commercial Pt/C catalyst. Density functional theory calculations reveal that Ru1/D-NiFe LDH optimizes the adsorption energies of intermediates for hydrogen evolution reaction and promotes the O–O coupling at a Ru–O active site for oxygen evolution reaction. The Ru1/D-NiFe LDH as an ideal model reveals superior water splitting performance with potential for the development of promising water-alkali electrocatalysts.

3D self-supported Ni(PO3)2–MoO3nanorods anchored on nickel foam for highly efficient overall water splitting

Nanoscale ◽  
2018 ◽  
Vol 10 (47) ◽  
pp. 22173-22179 ◽  
Author(s):  
Kai Li ◽  
Jingwen Ma ◽  
Xinglong Guan ◽  
Hongwei He ◽  
Min Wang ◽  
...  
Keyword(s):  
Energy Source ◽  
Water Splitting ◽  
Nickel Foam ◽  
Sustainable Energy ◽  
Environmental Crisis ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Supported Ni

Electrolyzing water as a sustainable energy source is a promising and appealing method to resolve the environmental crisis.

Ultrathin molybdenum disulfide/carbon nitride nanosheets with abundant active sites for enhanced hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1766-1773 ◽  
Author(s):  
Xingyue Qian ◽  
Junfei Ding ◽  
Jianli Zhang ◽  
Yue Zhang ◽  
Yining Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Molybdenum Disulfide ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Carbon Nitride ◽  
Carbon Nitride Nanosheets

The molybdenum disulfide/carbon nitride (MoS2/C3N4-3) nanosheets with ultrathin thickness present superior catalytic activity for hydrogen evolution reaction for water splitting.

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

2019 ◽  
Vol 9 (22) ◽  
pp. 1900624 ◽  
Author(s):  
Siraj Sultan ◽  
Jitendra N. Tiwari ◽  
Aditya Narayan Singh ◽  
Shynggys Zhumagali ◽  
Miran Ha ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Single Atoms

Efficient water splitting catalyzed by flexible NiP2 nanosheet array electrodes under both neutral and alkaline solutions

2017 ◽  
Vol 41 (5) ◽  
pp. 2154-2159 ◽  
Author(s):  
Zonghua Pu ◽  
Ya Xue ◽  
Wenqiang Li ◽  
Ibrahim Saana Amiinu ◽  
Shichun Mu
Keyword(s):  
High Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Alkaline Solutions ◽  
Nanosheet Array ◽  
Hydrogen Evolution Reactions

NiP2/CC exhibits high activity and stability under both neutral and alkaline solutions towards both oxygen and hydrogen evolution reactions.

Modulation of Cu and Rh single-atoms and nanoparticles for high-performance hydrogen evolution activity in acidic media

2021 ◽  
Author(s):  
Siraj Sultan ◽  
Muhammad Hanif Diorizky ◽  
Miran Ha ◽  
Jitendra N. Tiwari ◽  
Hansaem Choi ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
High Performance ◽  
Acidic Media ◽  
Single Atoms ◽  
Highly Efficient ◽  
Production Of Hydrogen ◽  
Electrochemical Water Splitting ◽  
Tremendous Challenge

The design of a highly efficient and durable electrocatalyst for the production of hydrogen from electrochemical water splitting is highly desirable, which remains a tremendous challenge. Though there has been...

Hierarchical Ni/NiTiO3 derived from NiTi LDHs: a bifunctional electrocatalyst for overall water splitting

2017 ◽  
Vol 5 (47) ◽  
pp. 24767-24774 ◽  
Author(s):  
Chenlong Dong ◽  
Xiangye Liu ◽  
Xin Wang ◽  
Xiaotao Yuan ◽  
Ziwan Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Catalytic Performance ◽  
Alkaline Solutions ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting

Ni/NiTiO3 manifests remarkable catalytic performance for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline solutions.

An Efficient Nickel Sulfide@NiO Nanocomposite Catalyst with High Density of Active Sites for the Hydrogen Evolution Reaction in Alkaline Media

2021 ◽  
Vol 21 (4) ◽  
pp. 2520-2528
Author(s):  
Shams Parveen Khokhar ◽  
Mazhar Ali Abbasi ◽  
Umair Aftab ◽  
Muhammad Ishaq Abro ◽  
Aqeel Ahmed Shah ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Alkaline Media ◽  
Alkaline Electrolyte ◽  
Oxide Content ◽  
Onset Potential ◽  
Composite Catalysts

Efficient hydrogen evolution reaction (HER) catalysts based on the earth-abundant materials are highly vital to design practical and environmentally friendly water splitting devices. In this study, we present an optimized strategy for the development of active catalysts for hydrogen evolution reaction HER. The composite catalysts are prepared with the nanosurface of NiO for the deposition of NiS by hydrothermal method. In alkaline electrolyte, the NiS/NiO nanocomposite has shown excellent catalytic HER properties at the low onset potential and small Tafel slope of 72 mVdec-1. A current density of 10 mA/cm2 is achieved by the nanocomposite obtained with 0.4 gram of NiO as nanosurface for the deposition of NiS (sample 4) at the cost of 429 mV versus RHE. The sample 4 carries more active sites that allow it to act as excellent HER catalyst. Based on this study, we conclude that increasing the nickel oxide content into composite sample facilitates the HER process. Additionally, a long term HER stability for 10 hours and good durability is also demonstrated by the sample 4. Our findings reveal that the optimization of nickel oxide content in the preparation of catalyst leads to the excellent HER activity for the design of practical water splitting devices and other related applications.

Sign in / Sign up

Export Citation Format

Share Document