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A facile approach to high-performance trifunctional electrocatalysts by substrate-enhanced electroless deposition of Pt/NiO/Ni on carbon nanotubes.
Nanoscale ( IF 5.8 ) Pub Date : 2020-06-10 , DOI: 10.1039/d0nr03378b Yaru Bian 1 , Hao Wang 1 , Zhi Gao 1 , Jintang Hu 1 , Dong Liu 1 , Liming Dai 2
Nanoscale ( IF 5.8 ) Pub Date : 2020-06-10 , DOI: 10.1039/d0nr03378b Yaru Bian 1 , Hao Wang 1 , Zhi Gao 1 , Jintang Hu 1 , Dong Liu 1 , Liming Dai 2
Affiliation
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Trifunctional electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are crucial for many electrochemical devices. Herein, novel trifunctional electrocatalysts of a hierarchically-structured Pt/NiO/Ni/CNT with ultrasmall Pt nanoparticles (∼2 nm) were synthesized via substrate-enhanced electroless deposition. The resulting catalysts exhibited a higher ORR activity (half-wave potential at 0.942 V) than that of the benchmark commercial Pt/C (20 wt%) and a similar OER activity (overpotential of 350 mV at 10 mA cm−2) to that of RuO2 in alkaline media. Moreover, the newly-developed Pt/NiO/Ni/CNT catalysts also showed a high mass activity superior to Pt/C towards the HER in both acid and alkaline electrolytes. The Pt/NiO/Ni/CNT catalysts, when used for overall water splitting, self-powered by two Zn–air batteries with the Pt/NiO/Ni/CNT air electrodes connected into series, displayed superb performance with 1.61 V at 10 mA cm−2. This work represents a breakthrough in the development of facile approaches to trifunctional catalysts from low-cost Earth-abundant materials for efficient energy conversion and storage.
中文翻译：
通过在碳纳米管上增强衬底的化学沉积Pt / NiO / Ni的方法来制备高性能三功能电催化剂。
对于许多电化学装置而言，用于氧还原反应（ORR），氧释放反应（OER）和氢释放反应（HER）的三功能电催化剂至关重要。本文中，通过基质增强化学沉积法合成了具有超小Pt纳米粒子（〜2 nm）的分层结构Pt / NiO / Ni / CNT的新型三功能电催化剂。所得催化剂显示出比基准商业Pt / C（20 wt％）更高的ORR活性（0.942 V时的半波电势）和与之相似的OER活性（10 mA cm -2时的过电势为350 mV ）。的RuO 2在碱性介质中。此外，在酸性和碱性电解质中，新开发的Pt / NiO / Ni / CNT催化剂对HER的质量活性也优于Pt / C。Pt / NiO / Ni / CNT催化剂用于整体水分解时，由两个串联的Pt / NiO / Ni / CNT空气电极的Zn空气电池自供电，在10 mA时显示1.61 V的出色性能厘米-2。这项工作代表了从低成本的富含地球的材料开发三功能催化剂的简便方法以实现有效的能量转换和存储方面的突破。
更新日期：2020-07-16
中文翻译：
通过在碳纳米管上增强衬底的化学沉积Pt / NiO / Ni的方法来制备高性能三功能电催化剂。
对于许多电化学装置而言，用于氧还原反应（ORR），氧释放反应（OER）和氢释放反应（HER）的三功能电催化剂至关重要。本文中，通过基质增强化学沉积法合成了具有超小Pt纳米粒子（〜2 nm）的分层结构Pt / NiO / Ni / CNT的新型三功能电催化剂。所得催化剂显示出比基准商业Pt / C（20 wt％）更高的ORR活性（0.942 V时的半波电势）和与之相似的OER活性（10 mA cm -2时的过电势为350 mV ）。的RuO 2在碱性介质中。此外，在酸性和碱性电解质中，新开发的Pt / NiO / Ni / CNT催化剂对HER的质量活性也优于Pt / C。Pt / NiO / Ni / CNT催化剂用于整体水分解时，由两个串联的Pt / NiO / Ni / CNT空气电极的Zn空气电池自供电，在10 mA时显示1.61 V的出色性能厘米-2。这项工作代表了从低成本的富含地球的材料开发三功能催化剂的简便方法以实现有效的能量转换和存储方面的突破。
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