2020
DOI: 10.1038/s41467-020-16554-5
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Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution

Abstract: Nickel-based catalysts are most commonly used in industrial alkaline water electrolysis. However, it remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems of hydrogen evolution reaction (HER). Here, we show a Cu-doped Ni catalyst implanted with Ni-O-VOx sites (Ni(Cu)VOx) for alkaline HER. The optimal Ni(Cu) VOx electrode exhibits a near-zero onset overpotential and low overpotential of 21 mV to deliver-10 mA cm −2 , which is comparable to benchmark Pt/C catalyst. … Show more

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Cited by 135 publications
(118 citation statements)
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“…However, the inert nature of N 2 and intensive competition from hydrogen evolution reaction (HER) impede its performance with sluggish kinetics and low selectivity. [3][4][5][6][7] Ru-based transition metal catalysts are active catalysts for NRR at ambient conditions that can activate and polarize the inert N 2 molecule by accepting and donating electronic density. [8][9][10][11] However, they are limited by the low selectivity and faradaic efficiency (FE) towards NH 3 that could be attributed to the high affinity of H-adsorption on the Ru surface.…”
mentioning
confidence: 99%
“…However, the inert nature of N 2 and intensive competition from hydrogen evolution reaction (HER) impede its performance with sluggish kinetics and low selectivity. [3][4][5][6][7] Ru-based transition metal catalysts are active catalysts for NRR at ambient conditions that can activate and polarize the inert N 2 molecule by accepting and donating electronic density. [8][9][10][11] However, they are limited by the low selectivity and faradaic efficiency (FE) towards NH 3 that could be attributed to the high affinity of H-adsorption on the Ru surface.…”
mentioning
confidence: 99%
“…62 Most recently, Zhao and co-workers fabricated Cu-doped Ni catalysts with implanted Ni-O-VO x composites (Ni(Cu)VO x ) via a facile electrodeposition approach as highly efficient HER catalysts. 59 The optimized Ni(Cu)VO x outperformed most precious-metal-free HER catalysts reported so far, with an extremely low overpotential of merely 21 mV to deliver 10 mA cm −2 . The enhanced HER activity originated from the optimal ΔG H* and H 2 release free energy, owing to the superactive Ni-O-VO x sites which promote the charge redistribution from Ni to VO x ( Figure 5A-C).…”
Section: Cation Dopingmentioning
confidence: 94%
“…100,149,161 The enhanced HER activity can also be achieved by metal doping because of the enhanced electron interactions and optimal ΔG H* during HER process. 59,62,162 For example, 3D hierarchical Cudoped porous Ni catalyst (Ni(Cu)/NF) exhibited satisfying catalytic activity toward HER because of the lattice distortion of Ni and the formation of NiO/Ni with increased interfacial activities. 62 Most recently, Zhao and co-workers fabricated Cu-doped Ni catalysts with implanted Ni-O-VO x composites (Ni(Cu)VO x ) via a facile electrodeposition approach as highly efficient HER catalysts.…”
Section: Cation Dopingmentioning
confidence: 99%
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