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Black Phosphorus-Modified Co3O4 through Tuning the Electronic Structure for Enhanced Oxygen Evolution Reaction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-04-25 00:00:00 , DOI: 10.1021/acsami.9b04078
Fangbing Shi , Keke Huang , Ying Wang 1 , Wei Zhang , Liping Li , Xiyang Wang , Shouhua Feng
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-04-25 00:00:00 , DOI: 10.1021/acsami.9b04078
Fangbing Shi , Keke Huang , Ying Wang 1 , Wei Zhang , Liping Li , Xiyang Wang , Shouhua Feng
Affiliation
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Spinel Co3O4, consisting of two mixed valence states, Co2+ and Co3+, has attracted enormous interest as a promising electrocatalyst for oxygen evolution reaction (OER). Proper control on the relative proportion of Co2+/Co3+ in cobalt oxide can greatly tune the electronic structure and further optimize its catalytic performance. Herein, a hybrid coupling Co3O4 with black phosphorus (Co3O4@BP) is designed as an efficient catalyst for OER. Electron migration from BP to Co3O4 is achieved in Co3O4@BP, owing to the higher Fermi level of BP than that of Co3O4. Efficient electron transfer can not only create massive active sites with abundant Co2+ but also remarkably suppress the deterioration of BP. Particularly, the Co3O4@BP catalyst outperforms the pristine Co3O4 by over four times and is even 20 times higher than that of bare BP at a potential of 1.65 V versus reversible hydrogen electrode. Our finding provides insightful understanding for electronic engineering in Co3O4@BP by balancing advantages and utilizing drawbacks of Co3O4 and BP.
中文翻译:
黑色磷改性的Co 3 O 4通过调节电子结构以增强氧气释放反应
尖晶石Co 3 O 4由两个混合的价态Co 2+和Co 3+组成,作为氧释放反应(OER)的有前途的电催化剂,引起了人们的极大兴趣。适当控制氧化钴中Co 2+ / Co 3+的相对比例可以极大地调节电子结构并进一步优化其催化性能。在此,将Co 3 O 4与黑磷的杂化偶联(Co 3 O 4 @BP)设计为用于OER的有效催化剂。电子迁移从BP对Co 3 ö 4在共同实现3 ö4 @BP,这是由于BP的费米能级比Co 3 O 4高。有效的电子转移不仅可以产生大量具有丰富Co 2+的活性位点,而且可以显着抑制BP的降解。特别地,与可逆氢电极相比,在1.65 V的电势下,Co 3 O 4 @BP催化剂的性能比原始Co 3 O 4高出四倍,甚至比裸BP高20倍。我们的发现为电子工程提供了精辟的理解有限公司3 Ø 4通过平衡的优点和利用有限的缺点@BP 3 Ø 4 和BP。
更新日期:2019-04-25
中文翻译:
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黑色磷改性的Co 3 O 4通过调节电子结构以增强氧气释放反应
尖晶石Co 3 O 4由两个混合的价态Co 2+和Co 3+组成,作为氧释放反应(OER)的有前途的电催化剂,引起了人们的极大兴趣。适当控制氧化钴中Co 2+ / Co 3+的相对比例可以极大地调节电子结构并进一步优化其催化性能。在此,将Co 3 O 4与黑磷的杂化偶联(Co 3 O 4 @BP)设计为用于OER的有效催化剂。电子迁移从BP对Co 3 ö 4在共同实现3 ö4 @BP,这是由于BP的费米能级比Co 3 O 4高。有效的电子转移不仅可以产生大量具有丰富Co 2+的活性位点,而且可以显着抑制BP的降解。特别地,与可逆氢电极相比,在1.65 V的电势下,Co 3 O 4 @BP催化剂的性能比原始Co 3 O 4高出四倍,甚至比裸BP高20倍。我们的发现为电子工程提供了精辟的理解有限公司3 Ø 4通过平衡的优点和利用有限的缺点@BP 3 Ø 4 和BP。