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Multifunctional Mo–N/C@MoS2 Electrocatalysts for HER, OER, ORR, and Zn–Air Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-09-29 , DOI: 10.1002/adfm.201702300
Ibrahim Saana Amiinu 1 , Zonghua Pu 1 , Xiaobo Liu 1 , Kwadwo Asare Owusu 2 , Hellen Gabriela Rivera Monestel 1 , Felix Ofori Boakye 1 , Haining Zhang 1 , Shichun Mu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-09-29 , DOI: 10.1002/adfm.201702300
Ibrahim Saana Amiinu 1 , Zonghua Pu 1 , Xiaobo Liu 1 , Kwadwo Asare Owusu 2 , Hellen Gabriela Rivera Monestel 1 , Felix Ofori Boakye 1 , Haining Zhang 1 , Shichun Mu 1
Affiliation
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Replacement of noble‐metal platinum catalysts with cheaper, operationally stable, and highly efficient electrocatalysts holds huge potential for large‐scale implementation of clean energy devices. Metal–organic frameworks (MOFs) and metal dichalcogenides (MDs) offer rich platforms for design of highly active electrocatalysts owing to their flexibility, ultrahigh surface area, hierarchical pore structures, and high catalytic activity. Herein, an advanced electrocatalyst based on a vertically aligned MoS2 nanosheet encapsulated Mo–N/C framework with interfacial Mo–N coupling centers is reported. The hybrid structure exhibits robust multifunctional electrocatalytic activity and stability toward the hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction. Interestingly, it further displays high‐performance of Zn–air batteries as a cathode electrocatalyst with a high power density of ≈196.4 mW cm−2 and a voltaic efficiency of ≈63 % at 5 mA cm−2, as well as excellent cycling stability even after 48 h at 25 mA cm−2. Such outstanding electrocatalytic properties stem from the synergistic effect of the distinct chemical composition, the unique three‐phase active sites, and the hierarchical pore framework for fast mass transport. This work is expected to inspire the design of advanced and performance‐oriented MOF/MD hybrid‐based electrocatalysts for wider application in electrochemical energy devices.
中文翻译：
HER，OER，ORR和Zn-空气电池的多功能Mo–N / C @ MoS2电催化剂
用便宜，操作稳定和高效的电催化剂代替贵金属铂催化剂具有大规模实施清洁能源装置的巨大潜力。金属-有机骨架（MOF）和金属二硫化二氢（MDs）因其柔韧性，超高表面积，分层孔隙结构和高催化活性而为高活性电催化剂的设计提供了丰富的平台。本文中，基于垂直取向的MoS 2的高级电催化剂纳米片封装的Mo–N / C框架与界面的Mo–N耦合中心。该杂化结构对氢析出反应，氧析出反应和氧还原反应显示出鲁棒的多功能电催化活性和稳定性。有趣的是，它进一步显示出高性能的锌空气电池作为阴极电催化剂，其高功率密度约为196.4 mW cm -2，在5 mA cm -2时的伏安效率约为63％，并具有出色的循环稳定性即使在25 mA cm -2的情况下经过48小时。如此出色的电催化性能源于独特的化学组成，独特的三相活性位点和分层的孔构架对快速质量传输的协同作用。预期这项工作将启发设计先进的，性能导向的基于MOF / MD杂化的电催化剂，将其广泛应用于电化学能源设备中。
更新日期：2017-09-29
中文翻译：
HER，OER，ORR和Zn-空气电池的多功能Mo–N / C @ MoS2电催化剂
用便宜，操作稳定和高效的电催化剂代替贵金属铂催化剂具有大规模实施清洁能源装置的巨大潜力。金属-有机骨架（MOF）和金属二硫化二氢（MDs）因其柔韧性，超高表面积，分层孔隙结构和高催化活性而为高活性电催化剂的设计提供了丰富的平台。本文中，基于垂直取向的MoS 2的高级电催化剂纳米片封装的Mo–N / C框架与界面的Mo–N耦合中心。该杂化结构对氢析出反应，氧析出反应和氧还原反应显示出鲁棒的多功能电催化活性和稳定性。有趣的是，它进一步显示出高性能的锌空气电池作为阴极电催化剂，其高功率密度约为196.4 mW cm -2，在5 mA cm -2时的伏安效率约为63％，并具有出色的循环稳定性即使在25 mA cm -2的情况下经过48小时。如此出色的电催化性能源于独特的化学组成，独特的三相活性位点和分层的孔构架对快速质量传输的协同作用。预期这项工作将启发设计先进的，性能导向的基于MOF / MD杂化的电催化剂，将其广泛应用于电化学能源设备中。
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