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Formation of Yolk–Shelled Nickel–Cobalt Selenide Dodecahedral Nanocages from Metal–Organic Frameworks for Efficient Hydrogen and Oxygen Evolution
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-09 00:00:00 , DOI: 10.1021/acssuschemeng.8b02343 Kelong Ao 1 , Jiancheng Dong 1 , Chonghui Fan 1 , Di Wang 1 , Yibing Cai 1 , Dawei Li 1 , Fenglin Huang 1 , Qufu Wei 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-09 00:00:00 , DOI: 10.1021/acssuschemeng.8b02343 Kelong Ao 1 , Jiancheng Dong 1 , Chonghui Fan 1 , Di Wang 1 , Yibing Cai 1 , Dawei Li 1 , Fenglin Huang 1 , Qufu Wei 1
Affiliation
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The development of cost-effective electrocatalysts for both hydrogen and oxygen evolution reactions (HER and OER) in alkaline media is crucial in renewable energy conversion technologies. Metal–organic frameworks (MOFs) can act as precursors to the design and construct of varied nanostructured materials which may be difficult to produce in other ways. Herein, we put forward a serial ion-exchange reaction and selenation strategy to prepare novel yolk–shelled Ni–Co–Se dodecahedral nanocages on carbon fiber paper (Y–S Ni–Co-Se/CFP). [email protected]/CFP was first synthesized by a simple ion-exchange reaction, followed by a hydrothermal selenation process to form Y–S Ni–Co-Se/CFP. Moreover, the composition of the as-prepared yolk–shelled Ni–Co–Se nanocages was a mixture of Co0.85Se and Ni0.85Se (Co/Ni atomic ratio of about 2.42). Due to their structural and compositional merits, the as-prepared Y–S Ni–Co-Se/CFP exhibited remarkable electrocatalytic activity and long-term stability (over 80% current retention for at least 18 h) for both HER and OER. For HER, it required an overpotential of 250 mV to attain a current density of 10 mA cm–2, which was 162 mV less than that of the Y–S Co0.85Se/CFP counterpart. The catalyst also efficiently catalyzed OER with a current density of 10 mA cm–2 at an overpotential of 300 mV, which was lower than those of other reported Co-based catalysts.
中文翻译：
由金属有机骨架形成蛋黄壳镍钴硒化十二面体纳米笼，以有效地释放氢气和氧气
在碱性介质中，开发用于氢和氧逸出反应（HER和OER）的具有成本效益的电催化剂对于可再生能源转换技术至关重要。金属有机框架（MOF）可以作为设计和构建各种纳米结构材料的先驱，而这些材料可能很难以其他方式生产。在此，我们提出了一系列离子交换反应和硒化策略，以在碳纤维纸上制备新型的蛋黄壳型Ni-Co-Se十二面体纳米笼（Y-S Ni-Co-Se / CFP）。[电子邮件保护] / CFP首先通过简单的离子交换反应合成，然后通过水热硒化工艺形成Y-S Ni-Co-Se / CFP。此外，制备的蛋黄壳Ni-Co-Se纳米笼的组成是Co 0.85 Se和Ni 0.85的混合物Se（Co / Ni原子比约为2.42）。由于它们的结构和组成优点，所制备的Y-S Ni-Co-Se / CFP对HER和OER均表现出显着的电催化活性和长期稳定性（至少18 h的电流保持率超过80％）。对于HER，它需要250 mV的过电势才能达到10 mA cm –2的电流密度，这比Y–S Co 0.85 Se / CFP的电流密度低162 mV 。该催化剂还可以在300 mV的超电势下以10 mA cm –2的电流密度有效地催化OER ，该电势比其他已报道的Co基催化剂低。
更新日期：2018-07-09
中文翻译：
由金属有机骨架形成蛋黄壳镍钴硒化十二面体纳米笼，以有效地释放氢气和氧气
在碱性介质中，开发用于氢和氧逸出反应（HER和OER）的具有成本效益的电催化剂对于可再生能源转换技术至关重要。金属有机框架（MOF）可以作为设计和构建各种纳米结构材料的先驱，而这些材料可能很难以其他方式生产。在此，我们提出了一系列离子交换反应和硒化策略，以在碳纤维纸上制备新型的蛋黄壳型Ni-Co-Se十二面体纳米笼（Y-S Ni-Co-Se / CFP）。[电子邮件保护] / CFP首先通过简单的离子交换反应合成，然后通过水热硒化工艺形成Y-S Ni-Co-Se / CFP。此外，制备的蛋黄壳Ni-Co-Se纳米笼的组成是Co 0.85 Se和Ni 0.85的混合物Se（Co / Ni原子比约为2.42）。由于它们的结构和组成优点，所制备的Y-S Ni-Co-Se / CFP对HER和OER均表现出显着的电催化活性和长期稳定性（至少18 h的电流保持率超过80％）。对于HER，它需要250 mV的过电势才能达到10 mA cm –2的电流密度，这比Y–S Co 0.85 Se / CFP的电流密度低162 mV 。该催化剂还可以在300 mV的超电势下以10 mA cm –2的电流密度有效地催化OER ，该电势比其他已报道的Co基催化剂低。
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