DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yutong Chen,Rong Wu,Guoan Lin,Jianyong Yue,Dezheng Kong,Chen Zhang,Shunhang Wei,Xiaoxiang Xu
Photocatalytic overall water splitting (POWS) was a promising technique for sustainable hydrogen provision that could potentially tackle the current energy and environmental challenges. As a visible-light-active photocatalyst, ZnIn2S4 was an ideal candidate for POWS yet was characterized with a low efficiency due to poor charge separation and improper surface reactions. Here, ZnIn2S4 was modified by doping Mo and depositing with bifunctional cocatalyst for efficient POWS under sunlight. Charge separation and photodeposition of Pt and CrOx was accelerated by Mo introduction to promote surface POWS reactions and suppress reverse reactions. Under simulated sunlight irradiation, the modified ZnIn2S4 achieved POWS with an apparent quantum efficiency (AQE) of 0.17% at 420 20 nm and a solar-to-hydrogen (STH) conversion efficiency of 0.016%. Theoretical calculations indicated that Mo dopants introduced spin-polarized states at both conduction band bottom and valence band top, being spin-forbidden for charge recombination. This study served as a useful guideline for the design and development of efficient photocataysts for sunlight-driven POWS.
研究领域:
材料科学
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能源化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Hu Yanru,Zhang Gengrui,Liu Lele,Chi ZiXin,Wang Shuai,Lin Jingdong,Xiong Haifeng,Wan Shaolong
The thermocatalytic conversion of hexose into valuable chemicals such as methyl lactate under mild conditions is very appealing. Here, we report that Mo, Mg co-modified Sn-β catalyst can effectively catalyze the transformation of glucose and fructose into alkyl lactate at moderate temperatures. A maximum yield of around 35% of methyl lactate was achieved from the conversion of glucose in methanol at 100°C over Sn-β catalyst modified with 3 wt% Mo and 0.5 wt% Mg. However, up to 82.8% yield of ethyl lactate was obtained in the case of fructose in ethanol upon the same catalytic condition, suggesting a significant solvent effect. The Mo species plays a key role to enable the retro-aldol condensation of fructose, in which the competing side reactions are significantly suppressed with the assistance of neighboring Mg species probably through a synergetic effect of Lewis acid-base.
研究领域:
催化化学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Wen Zhang,Jianyang Gao,Qinzhen Gong,Fusheng Liu,Yang Zhang,Guang-Rui Xu,Zexing Wu,Lei Wang
Seawater electrolysis is the most promising technology for hydrogen production, in which surface reconstruction on the interface of electrode/electrolyte plays a crucial role in activating the catalytic reactions with a low activation energy barrier. Herein, an efficient Mo modifying NiCoMo prickly flower clusters electrocatalyst supported on nickel foam (Mo-doped Ni/Co-OOH prickly flower clusters) is obtained, which serves as an eminently active and durable catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) due to the surface reconstruction during the alkaline seawater electrolysis with ultralow overpotentials. It just requires a cell voltage of 1.52 V to achieve the current density of 10 mA cm −2 for water electrolysis along with robust durability over 30 h. Mo doping effectively regulates the surface reconstruction of Ni/Co-OOH, which facilitates the adsorption of oxygen-containing intermediates on the active center, and the nonhomogeneous interface induces charge rearrangement for the catalytic process to improve efficiency, providing a new strategy for revealing the seawater electrolytic mechanism.
研究领域:
材料科学
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电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Lei Huang,Min Wei,Ning Hu,Panagiotis Tsiakaras,Pei Kang Shen
Noble metal binary and ternary catalysts have become a new class of fuel cell electrocatalysts due to their high catalytic activity. However, improvement is still necessary to reduce the consumption of Pt and obtain the quaternary Pt-based catalyst by Mo modification. Through the introduction of Mo(CO) 6 , novel quaternary hexapod nano-skeletons with high-index facets are obtained here, which are composed of core, first-layer feet and second-layer feet. Compared with PtCoNi nano-particles (NPs), the vertex-reinforced PtCoNiMo hexapod nano-skeletons (NSs), due to abundant tip areas, can facilitate electron transfer and mass exchange. It is found that the as prepared PtCoNiMo nano-skeletons catalyst exhibits enhanced mass activity, stability and anti-poisoning ability towards methanol oxidation reaction and oxygen reduction reaction, compared to commercial Pt/C catalyst and PtCoNi nanoparticles. More importantly, the development of quaternary catalysts can create better possibilities for the performance improvement of Pt-based catalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2017
·Vol. 19
·期 19
·4600-4609
·
IF 9.125
Long Yan,Xinxin Liu,Jin Deng,Yao Fu
Deoxygenation is the central challenge in converting bio-derived fatty esters into diesel-range hydrocarbons. A new molybdenum oxide doping nickel phyllosilicate (Mo–Ni@PSi) bifunctional catalyst was synthesized and used for the deoxygenation of methyl palmitate. Compared to impregnated Ni catalysts, Mo–Ni@PSi catalysts showed obviously enhanced catalytic activity for the deoxygenation process. Several structural variations induced by the introduction of Mo species were confirmed by H2-TPR, XRD, FT-IR, TEM, XPS, and NH3-TPD characterization. With these variations, more dispersive Ni nanoparticles (Ni NPs) and acidic sites were explored over the surface of modified Mo–Ni@PSi, which provided high catalytic activity for the deoxygenation of fatty esters. Furthermore, the content of the Mo element and the influences of activation temperature on the catalyst were also investigated. Remarkably, the highest catalytic activity was observed over the 3% Mo–Ni@PSi(B) catalyst with 98.3% yield of hydrocarbons at 220 °C and 1.0 MPa H2, and the catalytic activity decreased with further increase in the Mo content. Then, hydrodeoxygenation and decarbonylation processes were both confirmed in the reaction mechanism study. Additionally, the catalyst also presented good catalytic activity after four recycle reactions. The oxidization of reduced Ni and Mo species was probably the main reason for the deactivation of the catalyst.
研究领域:
催化化学
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能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Shuang Xue,Zhongyang Luo,Qingguo Zhou,Haoran Sun,Liwen Du
Novel preparation of molybdenum modified bimetallic micro-mesoporous catalyst was proposed innovatively to conduct catalytic fast pyrolysis of enzymatic hydrolysis lignin. The optimal catalytic characterization of the prepared catalyst was attributed to appropriate porous structure, the interaction between zeolite support and metal species, and the synergetic and stable mechanism of bimetallic active sites. With the incorporation of metal species into micro-mesoporous catalyst, the distribution of active sites experienced a regulation, which contributed to MAHs production and cracking of oxygen-containing substances. NiMo/AZM catalyst exhibited the most obvious coke inhibition effect (8.47 wt% of mass yield) and converted more high-ordered graphite carbon to low-ordered one, so as to make it easier to remove and prolong the catalyst lifetime, and obtained the highest mass yield of MAHs (13.15 wt%) as well as the minimum selectivity of bulky oxygenates (3.82%), which was the joint contribution of three key parameters.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）