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A novel bicomponent Co3S4/Co@C cocatalyst on CdS, accelerating charge separation for highly efficient photocatalytic hydrogen evolution
Green Chemistry ( IF 9.3 ) Pub Date : 2019-11-25 , DOI: 10.1039/c9gc03323h Yunpeng Liu 1, 1, 2, 3, 4 , Bingxiong Wang 1, 2, 3, 4 , Qiao Zhang 1, 2, 3, 4 , Siyuan Yang 3, 4, 5, 6 , Yuhang Li 3, 4, 7, 8 , Jianliang Zuo 1, 2, 3, 4 , Hongjuan Wang 1, 3, 4, 9, 10 , Feng Peng 1, 2, 3, 4
Green Chemistry ( IF 9.3 ) Pub Date : 2019-11-25 , DOI: 10.1039/c9gc03323h Yunpeng Liu 1, 1, 2, 3, 4 , Bingxiong Wang 1, 2, 3, 4 , Qiao Zhang 1, 2, 3, 4 , Siyuan Yang 3, 4, 5, 6 , Yuhang Li 3, 4, 7, 8 , Jianliang Zuo 1, 2, 3, 4 , Hongjuan Wang 1, 3, 4, 9, 10 , Feng Peng 1, 2, 3, 4
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In order to realize the dream of the practical application of hydrogen energy from solar energy and water, it is necessary to use efficient and earth-abundant cocatalysts for photocatalytic H2 evolution. Compared with a one-component cocatalyst, the multicomponent cocatalysts with a synergistic effect can effectively accelerate the separation of photogenerated electron–hole pairs in photocatalysis. Hence, a novel bicomponent Co3S4/Co@C cocatalyst on a CdS semiconductor photocatalyst is successfully synthesized by a one-step hydrothermal method. The Co3S4/Co-CdS photocatalyst obtained exhibits a highly efficient photocatalytic H2 evolution rate of 15.17 mmol h−1 g−1, which is 2.8 times higher than that of Pt-CdS. Furthermore, the quantum efficiency of Co3S4/Co-CdS reaches a maximum value of 16.80% at 475 nm. The significant improvement in the performance is because of the unique energy level structure of the Co3S4/Co-CdS photocatalyst, which has the maximum efficiency of charge separation and migration. This work not only presents a new protocol for constructing bicomponent cocatalysts on a semiconductor structure, but also proves that the bicomponent Co3S4/Co@C is a promising and low-cost cocatalyst.
中文翻译：
一种新型的CdS上双组分Co3S4 / Co @ C助催化剂，加速电荷分离，实现高效光催化制氢
为了实现将太阳能和水中的氢能实际应用的梦想，有必要使用有效且富于地球的助催化剂进行光催化H 2的释放。与单组分助催化剂相比，具有协同作用的多组分助催化剂可以有效促进光催化中光生电子-空穴对的分离。因此，通过一步水热法成功地在CdS半导体光催化剂上合成了新型的双组分Co 3 S 4 / Co @ C助催化剂。所获得的Co 3 S 4 / Co-CdS光催化剂显示出15.17 mmol h -1的高效光催化H 2释放速率。g -1，是Pt-CdS的2.8倍。此外，Co 3 S 4 / Co-CdS的量子效率在475nm处达到16.80％的最大值。性能的显着改善是因为Co 3 S 4 / Co-CdS光催化剂具有独特的能级结构，该结构具有最大的电荷分离和迁移效率。这项工作不仅提出了一种在半导体结构上构建双组分助催化剂的新方案，而且证明了双组分Co 3 S 4 / Co @ C是一种有前途且低成本的助催化剂。
更新日期：2019-11-25
中文翻译：
一种新型的CdS上双组分Co3S4 / Co @ C助催化剂，加速电荷分离，实现高效光催化制氢
为了实现将太阳能和水中的氢能实际应用的梦想，有必要使用有效且富于地球的助催化剂进行光催化H 2的释放。与单组分助催化剂相比，具有协同作用的多组分助催化剂可以有效促进光催化中光生电子-空穴对的分离。因此，通过一步水热法成功地在CdS半导体光催化剂上合成了新型的双组分Co 3 S 4 / Co @ C助催化剂。所获得的Co 3 S 4 / Co-CdS光催化剂显示出15.17 mmol h -1的高效光催化H 2释放速率。g -1，是Pt-CdS的2.8倍。此外，Co 3 S 4 / Co-CdS的量子效率在475nm处达到16.80％的最大值。性能的显着改善是因为Co 3 S 4 / Co-CdS光催化剂具有独特的能级结构，该结构具有最大的电荷分离和迁移效率。这项工作不仅提出了一种在半导体结构上构建双组分助催化剂的新方案，而且证明了双组分Co 3 S 4 / Co @ C是一种有前途且低成本的助催化剂。
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