Premium
Highly active and stable electrocatalytic transition metal phosphides ( Ni 2 P and FeP ) nanoparticles on porous carbon cloth for overall water splitting at high current density
Author(s) -
Shin Hyun Jung,
Park SungWoo,
Kim DongWan
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5833
Subject(s) - anode , materials science , water splitting , cathode , chemical engineering , electrocatalyst , electrode , hydrogen , nanoparticle , transition metal , substrate (aquarium) , current density , catalysis , nanotechnology , electrochemistry , chemistry , organic chemistry , physics , photocatalysis , quantum mechanics , engineering , oceanography , geology
Summary Highly active and stable hydrogen production at high current densities is required for practical application of electrocatalytic water splitting. In this study, highly active self‐supporting electrodes with excellent durability were designed and developed for high‐performance overall water splitting at a high current density. First, a colloid‐based dip‐coating method using porous carbon cloth (PCC) was introduced to obtain uniformly coated Ni and Fe nanoparticles on a conductive substrate. Then, the desired phase transitions of Ni and Fe to Ni 2 P and FeP, respectively, proceeded by thermal phosphidation at optimum temperature. The uniformly interconnected Ni 2 P layers on the PCC substrate (Ni 2 P@PCC) and FeP layers on the PCC substrate (FeP@PCC) exhibited outstanding oxygen and hydrogen evolution reactions, respectively. When each electrode was adopted as an anode and a cathode for the overall water splitting cell, excellent performance was achieved, with a low operational voltage of 1.76 V and high durability for 100 hours at a high current density of 50 mA cm −2 .