A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts | Zendy

Yingxia Gao | Zendy; Tuzhi Xiong | Zendy; Ya Li | Zendy; Yongchao Huang | Zendy; Yuping Li | Zendy; MuhammadSadeeq Balogun | Zendy

Open Access

A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts

Author(s) -

Yingxia Gao,

Tuzhi Xiong,

Ya Li,

Yongchao Huang,

Yuping Li,

MuhammadSadeeq Balogun

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.9b02315

Subject(s) - overpotential , electrocatalyst , oxygen evolution , water splitting , anode , materials science , electrolysis of water , chemical engineering , catalysis , cathode , electrolysis , inorganic chemistry , chemistry , electrode , electrochemistry , organic chemistry , photocatalysis , engineering , electrolyte

The stainless steel mesh (SSM) has received growing consideration as an electrocatalyst for efficient hydrogen and oxygen evolution reactions. Recently, the application of SSM as an oxygen evolution reaction (OER) electrocatalyst has been more promising, while its hydrogen evolution reaction (HER) catalytic activity is very low, which definitely affects its overall water splitting activity. Herein, a simple chemical bath deposition (CBD) method followed by phosphorization is employed to significantly boost the overall water splitting performance of SSM. The CBD method could allow the voids between the SSM fibers to be filled with Ni and P. Electrocatalytic studies show that the CBD-treated and phosphorized stainless steel (denoted SSM-Ni-P) exhibits an HER overpotential of 149 mV, while the phosphorization-free CBD-treated SSM (denoted as SSM-Ni) delivers an OER overpotential of 223 mV, both at a current density of 10 mA cm -2 . An asymmetric alkaline electrolyzer assembled based on the SSM-Ni-P cathode (HER) and SSM-Ni anode (OER) achieved an onset and 10 mA cm -2 current densities at an overall potential of 1.62 V, granting more prospects for the application of inexpensive and highly active electrocatalysts for electrocatalytic water splitting reactions.

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