Corrosion-resistant non-noble metal electrodes for PEM-type water electrolyzer
Corrosion-resistant non-noble metal electrodes for PEM-type water electrolyzer
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DOI：
10.1016/j.ijhydene.2021.09.116
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发表时间：
2021-10
影响因子：
7.2
通讯作者：
A. A. Tajuddin-A.;G. Elumalai;Zeyu Xi;Kailong Hu;Samuel Jeong;K. Nagasawa;J. Fujita;Y. Sone;Yoshikazu Ito
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文献类型：
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作者：
A. A. Tajuddin-A.;G. Elumalai;Zeyu Xi;Kailong Hu;Samuel Jeong;K. Nagasawa;J. Fujita;Y. Sone;Yoshikazu Ito
开发廉价且高度耐用的非贵金属催化剂用于水电解以可持续地生产氢气作为铂基催化剂的替代品至关重要。在此，我们报道了石墨烯封装的 NiMo 合金作为酸稳定的非贵金属催化剂电极。石墨烯封装的 NiMo 阴极在 0 至 5.0 A cm−2 的电位循环测试（10,000 次循环）中表现出高度稳定的性能，并且在 2.2 V 恒定电池电压下具有 100 小时的耐久性。通过调整氮掺杂石墨烯层的数量，实现了酸性环境中催化活性和腐蚀之间的平衡。通过在全电池质子交换膜型水电解槽中的应用，我们验证了贵金属催化剂可以被非贵金属催化剂替代。这种廉价的酸稳定非贵金属电极在质子交换膜型水电解中具有广阔的实际应用前景。
Developing cheap and highly durable non-noble metal catalysts for water electrolysis to sustainably produce hydrogen as alternatives to platinum-based catalysts is essential. Herein, we report graphene-encapsulated NiMo alloys as acid-stable non-noble metal catalyst electrodes. The graphene-encapsulated NiMo cathode showed a highly stable performance in the potential cycling test (10,000 cycles) from 0 to 5.0 A cm−2and 100 h of durability at a 2.2 V constant cell voltage. A balance between catalytic activity and corrosion in acidic environments was achieved by tuning the number of N-doped graphene layers. Through their application in a full-cell PEM-type water electrolyzer, we verify that noble metal catalysts can be replaced by non-noble metal catalysts. Such cheap acid-stable non-noble metal electrodes have promising practical applications in PEM-type water electrolysis.