Charge pumping enabling Co-NC to outperform benchmark Pt catalyst for pH-universal hydrogen evolution reaction

2021 ◽  
Author(s):  
Ziliang Chen ◽  
Huilin Qing ◽  
Ruirui Wang ◽  
Renbing Wu
Keyword(s):  
Transition Metals ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Pt Catalyst ◽  
Charge Pumping ◽  
Comparable Activity

Transition metals (TM) coupled with N-doped carbon (NC) nanocomposite has been regarded as an alternative electrocatalyst showing Pt-comparable activity towards hydrogen evolution reaction (HER), but to date none have outperformed...

Engineering the hydrogen evolution reaction of transition metals: effect of Li ions

2020 ◽  
Vol 8 (31) ◽  
pp. 15795-15808 ◽  
Author(s):  
Anku Guha ◽  
Nisheal M. Kaley ◽  
Jagannath Mondal ◽  
Tharangattu N. Narayanan
Keyword(s):  
Transition Metals ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Concentration

Hydrogen evolution reaction of metals is shown to be tunable with high concentration of Li ions in the electrolyte, irrespective of the pH of the electrolyte.

Selective atomic layer deposition of RuOx catalysts on shape-controlled Pd nanocrystals with significantly enhanced hydrogen evolution activity

2018 ◽  
Vol 6 (47) ◽  
pp. 24397-24406 ◽  
Author(s):  
Lei Zhang ◽  
Zhi-Jian Zhao ◽  
Mohammad Norouzi Banis ◽  
Lulu Li ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Comparable Activity ◽  
Shape Controlled

Octahedral Pd@RuOx/NCNT catalysts are achieved through atomic layer deposition, and exhibit comparable activity with Pt/C for hydrogen evolution reaction.

scholarly journals Highly Electroactive Ni Pyrophosphate/Pt Catalyst toward Hydrogen Evolution Reaction

2019 ◽  
Vol 11 (5) ◽  
pp. 4969-4982 ◽  
Author(s):  
Jayaraman Theerthagiri ◽  
Eduardo S. F. Cardoso ◽  
Guilherme V. Fortunato ◽  
Gleison A. Casagrande ◽  
Baskar Senthilkumar ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Pt Catalyst

scholarly journals Atomic Pt-Clusters Decoration Triggers a High-Rate Performance on Ni@Pd Bimetallic Nanocatalyst for Hydrogen Evolution Reaction in Both Alkaline and Acidic Medium

2020 ◽  
Vol 10 (15) ◽  
pp. 5155 ◽  
Author(s):  
Dinesh Bhalothia ◽  
Sheng-Po Wang ◽  
Shuan Lin ◽  
Che Yan ◽  
Kuan-Wen Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Acidic Medium ◽  
Lattice Mismatch ◽  
Cathodic Current Density ◽  
Green Energy ◽  
High Rate ◽  
Pt Catalyst ◽  
Cathodic Current

The development of inexpensive and highly robust nanocatalysts (NCs) to boost electrochemical hydrogen evolution reaction (HER) strengthens the implementation of several emerging sustainable-energy technologies. Herein, we proposed a novel nano-architecture consisting of a hierarchical structured Ni@Pd nanocatalyst with Pt-clusters decoration on the surface (denoted by Ni@Pd-Pt) for HER application in acidic (0.5 M H2SO4) and alkaline (0.1 M KOH) mediums. The Ni@Pd-Pt NC is fabricated on a carbon black support via a “self-aligned” heterogeneous nucleation-crystal growth mechanism with 2 wt.% Pt-content. As-prepared Ni@Pd-Pt NC outperforms the standard Pt/C (30 wt.% Pt) catalyst in HER and delivers high-rate catalytic performance with an ultra-low overpotential (11.5 mV) at the cathodic current density of 10 mA∙cm−2 in alkaline medium, which is 161.5 mV and 14.5 mV less compared to Ni@Pd (173 mV) and standard Pt/C (26 mV) catalysts, respectively. Moreover, Ni@Pd-Pt NC achieves an exactly similar Tafel slope (42 mV∙dec−1) to standard Pt/C, which is 114 mV∙dec−1 lesser when compared to Ni@Pd NC. Besides, Ni@Pd-Pt NC exhibits an overpotential value of 37 mV at the current density of 10 mA cm−2 in acidic medium, which is competitive to standard Pt/C catalyst. By utilizing physical characterizations and electrochemical analysis, we demonstrated that such an aggressive HER activity is dominated by the increased selectivity during HER due to the reduced competition between intermediate products on the non-homogeneous NC surface. This phenomenon can be rationalized by electron localization owing to the electronegative difference (χPt > χPd > χNi) and strong lattice mismatch at the Ni@Pd heterogeneous binary interfaces. We believe that the obtained results will significantly provide a facile design strategy to develop next-generation heterogenous NCs for HER and related green-energy applications

Neighboring effect induced by V and Cr doping in FeCoP nanoarrays for the hydrogen evolution reaction with Pt-like performance

2020 ◽  
Vol 8 (3) ◽  
pp. 1184-1192 ◽  
Author(s):  
Laifei Xiong ◽  
Bin Wang ◽  
Hairui Cai ◽  
Tao Yang ◽  
Liqun Wang ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Transition Metals ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Model Catalyst ◽  
Functional Theory ◽  
Cr Doping ◽  
Effect Of Doping

A ternary FeCoP nanoarray was used as a model catalyst to study the effect of doping 3d transition metals on its Hydrogen Evolution Reaction (HER) performance through density functional theory (DFT) and experiments.

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