Bimetals Ni–Mo–S-Modified Hollow Cubic Cu_2–xS for Visible-Light Photocatalytic H₂ Evolution

Abstract

Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–x S@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–x S@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–x S–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–x S (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–x S. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–x S not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.

Accelerated Charge Transfer through Interface Chemical Bonds in MoS2/TiO2 for Photocatalytic Conversion of Lignocellulosic Biomass to H2

“…For the high-resolution O 1s spectra, the broad peak can be deconvoluted into three peaks at binding energies of 530.1, 530.6, and 532.2 eV, which can be attributed to the Ti–O–Ti, V O , and chemisorbed oxygen species, respectively . In the high-resolution Mo 3d XPS spectra shown in Figure d, the binding energies of Mo 3d 5/2 and Mo 3d 3/2 were located at 228.4 and 232.3 eV, respectively . Meanwhile, a shoulder peak at around 226.6 eV can be attributed to S 2s …”

Design, Synthesis, and Diverse Applications of Cu-Based Photocatalysts: A Review

“…On the basis of the construction of heterojunctions, the rational design of catalyst morphology is also an effective way to improve the light absorption capacity. Li et al prepared a hollow Cu 2– x S@Ni-Mo-S photocatalyst by using Cu 2 O as a template . The Cu 2– x S hollow cubic structure provides more active sites for the reaction, and its local plasmonic resonance effect can cooperate with heterojunctions to effectively increase the transfer rate of photogenerated charge.…”

“…Li et al prepared a hollow Cu 2−x S@Ni-Mo-S photocatalyst by using Cu 2 O as a template. 219 The Cu 2−x S hollow cubic structure provides more active sites for the reaction, and its local plasmonic resonance effect can cooperate with heterojunctions to effectively increase the transfer rate of photogenerated charge.…”

Ultrafast Microwave Synthesis of Ru-Doped MoP with Abundant P Vacancies as the Electrocatalyst for Hydrogen Generation in a Wide pH Range

“…With increasing demand for energy and the growing concern over environmental pollution, it is pressing to exploit alternative energies to substitute non-renewable fossil fuels. − As a sustainable clean energy source, hydrogen is considered an ideal candidate for sustainable energy supply. − Among the developed hydrogen production technologies, electrocatalytic water electrolysis is an eco-friendly and efficient way for hydrogen generation. − To optimize the reaction efficiency, designing highly efficient and stable catalysts for the hydrogen evolution reaction (HER) is important. At present, platinum (Pt) and its derivatives are recognized as benchmarked HER catalysts, but their high cost and shortage limit their large-scale commercial applications. ,− Therefore, the development of inexpensive and efficient catalysts for HER is critical for achieving hydrogen production through water electrolysis.…”