Effects of nickel doping on the preferred orientation and oxidation potential of Ti/Sb-SnO2 anodes prepared by spray pyrolysis

TL;DR

This study investigates how nickel doping influences the structure and oxygen evolution potential of Ti/Sb-SnO2 anodes prepared by spray pyrolysis, revealing increased preferred orientation and higher onset potentials with more nickel.

Contribution

It provides systematic analysis of nickel's effect on the structural and electrochemical properties of Ti/Sb-SnO2 anodes, highlighting the relationship between doping level and performance.

Findings

SnO2 grows preferentially along (101) with more nickel

Onset potential for oxygen evolution exceeds 2.4 V vs NHE with nickel doping

Work function increases with nickel doping, enhancing oxygen evolution potential

Abstract

Nickel and antimony co-doped Ti/SnO2 (Ti/Ni-Sb-SnO2) anodes were prepared by spray pyrolysis. Effects of nickel concentration on the structure and onset potential for oxygen evolution of Ti/Ni-Sb-SnO2 anodes have been systematically investigated. XRD analyses suggest that SnO2 thin films grow in preferential orientation along (101) plane as the nickel concentration increases. The enhanced onset potential of oxygen is above 2.4 V vs NHE due to the introduction of nickel doping, and increases slightly with the nickel concentration. The calculated results show that work function of Ni/Sb co-doped SnO2 also increases with the Ni doping level, which contributes to the enhancement of onset potential for oxygen evolution.