Electrocatalytic Hydrogen Evolution in Neutral pH
Solutions: Dual-Phase Synergy
Version 2 2019-08-23, 14:48
Version 1 2019-08-23, 14:40
Posted on 2019-08-23 - 14:48
Electrolysis in neutral
pH solutions (e.g., wastewater and seawater)
presents a transformative way for environmentally friendly, cost-effective
hydrogen production. However, one of the biggest challenges is the
lack of active, robust hydrogen evolution reaction (HER) catalysts.
Herein, we present a catalyst with dual-active sites of MoP2 and MoP, which function synergistically to promote HER in neutral
pH solutions. In our microbial electrolysis cell (MEC) test, which
uses neutral pH wastewater as feedstock, this catalyst delivers an
average HER current density of 157 A mcathode‑surface‑area–2, higher than Pt catalyst (145 A mcathode‑surface‑area–2)with the same amount of catalyst loading,
∼5 times higher than the state-of-art Pt group metal-free catalysts
in MECs. Our catalyst also outperforms Pt in natural seawater with
∼10% higher and more stable HER current density. The fundamental
reason for the enhanced HER performance is identified to be the synergy
between MoP2 and MoP phases, with MoP2 promoting
H2O dissociation and MoP efficiently converting Had into H2.
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Xie, Xiaohong; Song, Miao; Wang, Luguang; Engelhard, Mark H.; Luo, Langli; Miller, Andrew; et al. (2019). Electrocatalytic Hydrogen Evolution in Neutral pH
Solutions: Dual-Phase Synergy. ACS Publications. Collection. https://doi.org/10.1021/acscatal.9b02609
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AUTHORS (17)
XX
Xiaohong Xie
MS
Miao Song
LW
Luguang Wang
ME
Mark H. Engelhard
LL
Langli Luo
AM
Andrew Miller
YZ
Yayun Zhang
LD
Lei Du
HP
Huilin Pan
ZN
Zimin Nie
YC
Yuanyuan Chu
LE
Luis Estevez
ZW
Zidong Wei
HL
Hong Liu
CW
Chongmin Wang
DL
Dongsheng Li
YS
Yuyan Shao