Efficient H-2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst

doi:10.1021/acscatal.7b00876

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源综合利用工程技术中心

	Efficient H-2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst
	You, Bo; Liu, Xuan; Liu, Xin; Sun, Yujie
刊名	ACS CATALYSIS
	2017-07
卷号	7 期号:7 页码:4564-4570
ISSN号	2155-5435
DOI	10.1021/acscatal.7b00876
英文摘要	Water electrolysis to produce H-2 and O-2 with renewable energy input has been generally viewed as an attractive route to meet future global energy demands. However, the sluggish O-2 evolution reaction usually requires high overpotential and may yield reactive oxygen species (ROS) that can degrade the electrolyzer membrane and hence shorten the device lifetime. In addition, the potential gas crossover may result in an explosive H-2/O-2 mixture and hence safety risks. To address these issues, we herein report a general electrolysis strategy for the simultaneous H-2 production and alcohol oxidative upgrading (e.g., benzyl alcohol, 4-nitrobenzyl alcohol, 4-methylbenzyl alcohol, ethanol, and 5-hydroxymethylfurfural), in which the thermodynamics of the latter is much easier than that of water oxidation. A facile and environmentally friendly template-free electrodeposition was used to obtain a 3D hierarchically porous nickel-based electrocatalyst (hp-Ni) for such an integrated electrolysis, requiring a voltage of similar to 220 mV smaller than that of water splitting to achieve 50 mA cm(-2) together with robust stability, high Faradaic efficiencies, and no formation of ROS, as well as production of valuable products at both the cathode (H-2) and anode (alcohol oxidation products). More importantly, we demonstrated that these diverse alcohol oxidations over hp-Ni exhibited similar onset potentials which were largely determined by the desirable oxidation potential of hp-Ni, irrespective of the different intrinsic thermodynamics of these alcohol oxidation reactions. This result provides a new direction for the rational design of heterogeneous transition-metal-based electrocatalysts with lower oxidation potential for more highly efficient electrocatalytic alcohol oxidation.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34557]
专题	青海盐湖研究所_盐湖资源综合利用工程技术中心
推荐引用方式 GB/T 7714	You, Bo,Liu, Xuan,Liu, Xin,et al. Efficient H-2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst[J]. ACS CATALYSIS,2017,7(7):4564-4570.
APA	You, Bo,Liu, Xuan,Liu, Xin,&Sun, Yujie.(2017).Efficient H-2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst.ACS CATALYSIS,7(7),4564-4570.
MLA	You, Bo,et al."Efficient H-2 Evolution Coupled with Oxidative Refining of Alcohols via A Hierarchically Porous Nickel Bifunctional Electrocatalyst".ACS CATALYSIS 7.7(2017):4564-4570.