当前位置：
X-MOL 学术
›
ACS Energy Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Ni–Co Codoping Breaks the Limitation of Single-Metal-Doped IrO2 with Higher Oxygen Evolution Reaction Performance and Less Iridium
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acsenergylett.7b01032 Waqas Qamar Zaman 1 , Zhiqiang Wang 2 , Wei Sun 1 , Zhenhua Zhou 1 , Muhammad Tariq 1 , Limei Cao 1 , Xue-Qing Gong 2 , Ji Yang 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acsenergylett.7b01032 Waqas Qamar Zaman 1 , Zhiqiang Wang 2 , Wei Sun 1 , Zhenhua Zhou 1 , Muhammad Tariq 1 , Limei Cao 1 , Xue-Qing Gong 2 , Ji Yang 1
Affiliation
|
Synthesizing solid solutions of IrO2 via doping is known to be a viable approach for effectively using iridium metal by enhancing its intrinsic properties. However, such composites at certain fractional values of dopants realize the substitution limit because of lattice mismatch. Here, on the basis of density functional theory studies and experimentation, we demonstrate codoping as an effective approach to overcome this result with an outstanding oxygen evolution reaction (OER) activity. Nickel and cobalt as the case dopants for the host structure IrO2 atomically substituted 50% of the precious metal. As a new structural insight, the decreased crystal energy was determined to be the key factor for considerable insertion of dopants. Furthermore, the synthesized codoped IrO2 reflected an overpotential of only 285 mV at a current density of 10 mA·cm–2, which is appreciably lower than the 320 and 330 mV for individually doping cobalt and nickel, respectively. Our presented approach suggests further OER optimization methods with extensive reduction of precious metals.
中文翻译：
Ni-Co共掺杂打破了单金属掺杂IrO 2的局限，具有更高的析氧反应性能和更少的铱
已知通过掺杂合成IrO 2的固溶体是通过增强铱金属的固有特性来有效使用铱金属的可行方法。然而，由于晶格失配，这种在一定比例的掺杂剂下的复合物实现了取代极限。在这里，基于密度泛函理论的研究和实验，我们证明了共掺杂是克服氧自由基反应（OER）活性的有效方法。镍和钴作为主体结构IrO 2的表面掺杂剂，原子取代了50％的贵金属。作为一种新的结构见解，降低的晶体能量被确定为大量插入掺杂剂的关键因素。此外，合成的共掺杂IrO图2反映了在10 mA·cm -2的电流密度下仅285 mV的过电势，这明显低于分别单独掺杂钴和镍的320和330 mV。我们提出的方法提出了进一步减少大量贵金属的OER优化方法。
更新日期：2017-11-09
中文翻译：
Ni-Co共掺杂打破了单金属掺杂IrO 2的局限，具有更高的析氧反应性能和更少的铱
已知通过掺杂合成IrO 2的固溶体是通过增强铱金属的固有特性来有效使用铱金属的可行方法。然而，由于晶格失配，这种在一定比例的掺杂剂下的复合物实现了取代极限。在这里，基于密度泛函理论的研究和实验，我们证明了共掺杂是克服氧自由基反应（OER）活性的有效方法。镍和钴作为主体结构IrO 2的表面掺杂剂，原子取代了50％的贵金属。作为一种新的结构见解，降低的晶体能量被确定为大量插入掺杂剂的关键因素。此外，合成的共掺杂IrO图2反映了在10 mA·cm -2的电流密度下仅285 mV的过电势，这明显低于分别单独掺杂钴和镍的320和330 mV。我们提出的方法提出了进一步减少大量贵金属的OER优化方法。
京公网安备 11010802027423号