For the cathodic process it is likely that there exists a coupling between ni2 + discharge and hydrogen evolution . hydrogen evolution on working electrode should have masked the nickel ion reduction peak in lsv curve 对于阴极过程,镍离子放电和氢气析出过程存在耦合,氢气的析出可能掩盖了线性电位扫描曲线上镍还原的电流峰。