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Interface Engineering of Hematite with Nacre-like Catalytic Multilayers for Solar Water Oxidation
ACS Nano ( IF 15.8 ) Pub Date : 2018-12-04 00:00:00 , DOI: 10.1021/acsnano.8b06848 Yeongkyu Choi 1 , Dasom Jeon 2 , Yuri Choi 1 , Dongseok Kim 3 , Nayeong Kim 2 , Minsu Gu 2 , Sanghyun Bae 2 , Taemin Lee 1 , Hyun-Wook Lee 2 , Byeong-Su Kim 3 , Jungki Ryu 2
ACS Nano ( IF 15.8 ) Pub Date : 2018-12-04 00:00:00 , DOI: 10.1021/acsnano.8b06848 Yeongkyu Choi 1 , Dasom Jeon 2 , Yuri Choi 1 , Dongseok Kim 3 , Nayeong Kim 2 , Minsu Gu 2 , Sanghyun Bae 2 , Taemin Lee 1 , Hyun-Wook Lee 2 , Byeong-Su Kim 3 , Jungki Ryu 2
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An efficient water oxidation photoanode based on hematite has been designed and fabricated by tailored assembly of graphene oxide (GO) nanosheets and cobalt polyoxometalate (Co-POM) water oxidation catalysts into a nacre-like multilayer architecture on a hematite photoanode. The deposition of catalytic multilayers provides a high photocatalytic efficiency and photoelectrochemical stability to underlying hematite photoanodes. Compared to the bare counterpart, the catalytic multilayer electrode exhibits a significantly higher photocurrent density and large cathodic shift in onset potential (∼369 mV) even at neutral pH conditions due to the improved charge transport and catalytic efficiency from the rational and precise assembly of GO and Co-POM. Unexpectedly, the polymeric base layer deposited prior to the catalytic multilayers improves the performance even more by facilitating the transfer of photogenerated holes for water oxidation through modification of the flat band potential of the underlying photoelectrode. This approach utilizing polymeric base and catalytic multilayers provides an insight into the design of highly efficient photoelectrodes and devices for artificial photosynthesis.
中文翻译：
珍珠母质催化多层赤铁矿太阳能氧化界面工程
通过将氧化石墨烯（GO）纳米片和多金属氧酸钴（Co-POM）钴水氧化催化剂量身定制组装成赤铁矿光阳极上的珍珠质多层结构，已经设计和制造了基于赤铁矿的高效水氧化光阳极。催化多层的沉积为下面的赤铁矿光阳极提供了高的光催化效率和光电化学稳定性。与裸露的裸电极相比，由于GO的合理而精确的组装改善了电荷传输和催化效率，因此即使在中性pH条件下，催化多层电极也显示出显着更高的光电流密度和起始电位大的阴极移位（约369 mV）。和联合POM。不料，在催化多层之前沉积的聚合物基础层通过改变下面的光电极的平带电势来促进光生空穴的转移以进行水氧化，从而进一步提高了性能。这种利用聚合物基体和催化多层的方法为深入了解用于人工光合作用的高效光电极和装置的设计提供了见识。
更新日期：2018-12-04
中文翻译：
珍珠母质催化多层赤铁矿太阳能氧化界面工程
通过将氧化石墨烯（GO）纳米片和多金属氧酸钴（Co-POM）钴水氧化催化剂量身定制组装成赤铁矿光阳极上的珍珠质多层结构，已经设计和制造了基于赤铁矿的高效水氧化光阳极。催化多层的沉积为下面的赤铁矿光阳极提供了高的光催化效率和光电化学稳定性。与裸露的裸电极相比，由于GO的合理而精确的组装改善了电荷传输和催化效率，因此即使在中性pH条件下，催化多层电极也显示出显着更高的光电流密度和起始电位大的阴极移位（约369 mV）。和联合POM。不料，在催化多层之前沉积的聚合物基础层通过改变下面的光电极的平带电势来促进光生空穴的转移以进行水氧化，从而进一步提高了性能。这种利用聚合物基体和催化多层的方法为深入了解用于人工光合作用的高效光电极和装置的设计提供了见识。
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