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Self‐Supported Cu 3 P Nanowire Arrays as an Integrated High‐Performance Three‐Dimensional Cathode for Generating Hydrogen from Water
Author(s) -
Tian Jingqi,
Liu Qian,
Cheng Ningyan,
Asiri Abdullah M.,
Sun Xuping
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201403842
Subject(s) - overpotential , tafel equation , nanowire , cathode , faraday efficiency , electrolyte , materials science , catalysis , current density , hydrogen , chemical engineering , water splitting , nanotechnology , chemistry , electrochemistry , electrode , organic chemistry , physics , quantum mechanics , engineering , photocatalysis
Searching for inexpensive hydrogen evolution reaction (HER) electrocatalysts with high activity has attracted considerable research interest in the past years. Reported herein is the topotactic fabrication of self‐supported Cu 3 P nanowire arrays on commercial porous copper foam (Cu 3 P NW/CF) from its Cu(OH) 2 NW/CF precursor by a low‐temperature phosphidation reaction. Remarkably, as an integrated three‐dimensional hydrogen‐evolving cathode operating in acidic electrolytes, Cu 3 P NW/CF maintains its activity for at least 25 hours and exhibits an onset overpotential of 62 mV, a Tafel slope of 67 mV dec −1 , and a Faradaic efficiency close to 100 %. Catalytic current density can approach 10 mA cm −2 at an overpotential of 143 mV.