Fe3C/CdS as noble-metal-free composite photocatalyst for highly enhanced photocatalytic H2 production under visible light
Fe3C/CdS as noble-metal-free composite photocatalyst for highly enhanced photocatalytic H2 production under visible light
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Fe3C/CdS 作为不含贵金属的复合光催化剂，用于在可见光下高度增强光催化制氢
DOI：
10.1016/j.apcata.2020.117768
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发表时间：
2020-08-05
影响因子：
5.5
通讯作者：
Gao, Lijun
中科院分区：
文献类型：
--
作者：
Irfan, Rana Muhammad;Tahir, Mudassir Hussain;Gao, Lijun
开发可扩展且廉价的太阳能氢 (H-2) 光催化系统需要非贵金属助催化剂。 Fe3C与一维金属硫化物光吸收剂的集成极大地提高了光催化H-2析出的活性和耐久性。因此，实现了195 μ mol h(-1)的增强析氢速率，比纯CdS NRs高15倍。在单色 420 nm 光下表观量子产率接近 11.5%。另一方面，光敏剂的光腐蚀受到阻碍，并且该系统在可见光下表现出22小时的鲁棒稳定性。此外，Fe3C 在电催化 HER 方面表现出高电流密度和低过电势，证明其用于 H-2 析出是可行的。利用电化学研究、BET 表面积、PL 和 TRPL 光谱全面研究了 Fe3C 的作用。这项工作证明了 Fe3C/CdS NR 作为一种有前途的廉价光催化剂的巨大潜力，具有高活性和稳定性，可在可见光下生产 H-2。
Development of photocatalytic systems for scalable and inexpensive solar hydrogen (H-2) requires non-noble metal cocatalysts. Integration of Fe3C with 1D metal sulfide photo-absorber highly improved the activity and durability of photocatalytic H-2 evolution. Consequently, the enhanced hydrogen evolution rate of 195 mu mol h(-1) was achieved which is 15 times higher than that of pure CdS NRs. The apparent quantum yield was approached to 11.5 % under monochromatic 420 nm light. On the other hand, photocorrosion of the photosensitizer was hampered and the system demonstrated robust stability of 22 h under visible light. Moreover, Fe3C showcased high current density with low overpotential for electrocatalytic HER, proving it feasible for H-2 evolution. The role of Fe3C was comprehensively studied using electrochemical studies, BET surface area, PL and TRPL spectroscopy. This work demonstrated the exceptional potential of Fe3C/CdS NRs as a promising inexpensive photocatalyst with high activity and stability for H-2 production under visible light.