Electronic structure tuning during facile construction of two-phase tungsten based electrocatalyst for hydrogen evolution reaction

doi:10.1016/j.electacta.2018.06.190

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Electronic structure tuning during facile construction of two-phase tungsten based electrocatalyst for hydrogen evolution reaction
	Shi, MQ ; Li, W ; Fang, J ; Jiang, ZZ ; Gao, J ; Chen, ZY ; Sun, FF ; Xu, YH
刊名	ELECTROCHIMICA ACTA
	2018
卷号	283 期号:-页码:834-841
关键词	HIGHLY EFFICIENT PHOSPHIDE NANOPARTICLES CARBIDE NANOPARTICLES MOLYBDENUM PHOSPHIDE PHOSPHOTUNGSTIC ACID GENERATING HYDROGEN CATALYTIC-ACTIVITY HIGH-PERFORMANCE NANOWIRE ARRAYS DOPED GRAPHENE
ISSN号	0013-4686
DOI	10.1016/j.electacta.2018.06.190
文献子类	期刊论文
英文摘要	Fabrication of effective electrocatalysts combining two pure phases including carbide and phosphide with a certain proportion by the clean and simple strategies still remain a challenge. Here we synthesized tungsten carbide/tungsten phosphide-coated N-doped carbon (W2C/WP@NC) by one-step pyrolysis process without participation of PH3. In this synthesis process phosphotungstic acid, a heteropolyacid provided P and W atoms while 2,6-diaminopyridine, a heterocyclic compound with strong alkalinity acted as C and N source. 2,6-diaminopyridine was carefully chosen because it made a contribution to the complete decomposition of phosphotungstic acid where WO42- and PO43- groups were formed which both were essential to formation of WP phases. An overpotential of 83 mV which was required to achieve a current density of 10 mA cm(-2) in 0.5 M H2SO4 exhibited the high electrocatalytic activity of W2C/ WP@NC catalyst in hydrogen evolution reaction (HER). The weight ratio of W2C to WP was calculated by Rietveld refinement and near edge X-ray absorption fine structure (XANES). W L(3)3-edge XANES spectra of different samples confirmed that little amount of WP could tune the electron state on W species. The enhanced HER performance was attributed to the favorable electron distribution on W species in W2C/ WP@NC which approached to the balance between H-atom adsorption and desorption. (C) 2018 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30929]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 2.Zhejiang Univ Technol, Coll Chem Engn, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310032, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Shi, MQ,Li, W,Fang, J,et al. Electronic structure tuning during facile construction of two-phase tungsten based electrocatalyst for hydrogen evolution reaction[J]. ELECTROCHIMICA ACTA,2018,283(-):834-841.
APA	Shi, MQ.,Li, W.,Fang, J.,Jiang, ZZ.,Gao, J.,...&Xu, YH.(2018).Electronic structure tuning during facile construction of two-phase tungsten based electrocatalyst for hydrogen evolution reaction.ELECTROCHIMICA ACTA,283(-),834-841.
MLA	Shi, MQ,et al."Electronic structure tuning during facile construction of two-phase tungsten based electrocatalyst for hydrogen evolution reaction".ELECTROCHIMICA ACTA 283.-(2018):834-841.