INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·
IF 4.229
Cong Wang,Hongli Wang,Zhili Wang,Xiaoju Li,Yue Chi,Minggang Wang,Dawei Gao,Zhankui Zhao
Ammonia borane (AB) has been identified as one of the most promising candidates for chemical hydrogen storage . However, the practical application of AB for hydrogen production is hindered by the need of efficient and inexpensive catalysts. For the first time, we report that the incorporation of Mo into Cu@Co core-shell structure can significantly improve the catalytic efficiency of hydrogen generation from the hydrolysis of AB. The Cu 0.81 @Mo 0.09 Co 0.10 core-shell catalyst displays high catalytic activity towards the hydrolysis dehydrogenation of AB with a turnover frequency (TOF) value of 49.6 molH 2 mol cat −1 min −1 , which is higher than most of Cu-based catalysts ever reported, and even comparable to those of noble-metal based catalysts. The excellent catalytic performance is attributed to the multi-elements co-deposition effect and electrons transfer effect of Cu, Mo and Co in the tri-metallic core-shell NPs.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Lin-Chang Liu,Hong-Lin Zhu,Yue-Qing Zheng
Ammonia borane (NH3BH3, referred to as AB) hydrolytic dehydrogenation is regarded as a feasible strategy for hydrogen production owing to its high hydrogen content, pollution-free nature, and high stability. Metal nitrogen-doped carbon materials (M-N-C) are considered as an ideal candidate support of catalysts with AB hydrolytic dehydrogenation due to the advantages of low cost, large specific surface area, rich defective site, and good chemical stability. In this work, tubular Ni@Ni-N-C was successfully synthesized by high-temperature pyrolysis, and then, Rh nanoparticles were decorated on the support Ni@Ni-N-C by impregnation and reduction to prepare a series of Rh/Ni@Ni-N-C. The best catalytic performance of catalysts is obtained using Ni@Ni-N-C with an Rh loading of 0.74 wt %, showing a turnover frequency as high as 782.18 min–1 and an apparent activation energy (Ea) as low as 25.86 kJ mol–1, which could be attributed to the strong interaction between Rh and the defective site of the support.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jiahuan He,Ziwei Huang,Wenzheng Chen,Xuezhang Xiao,Zhendong Yao,Zhaoqing Liang,Liujun Zhan,Ling Lv,Jiacheng Qi,Xiulin Fan,Lixin Chen
Recently, hydrolysis of ammonia borane (AB) is a promising way of producing and employing hydrogen in mild conditions. Nonetheless, the failure to develop inexpensive and high-performance catalyst impedes the further scale hydrogen energy application of AB. Given the fact that ex-situ formed nanocatalysts could be prone to abscission and agglomeration for insufficient dispersion and support, 1D composite microrods with 0D/1D/2D spatial structure constructed by mutual-supported 2D single-crystal Co 2 Mo 3 O 8 nanosheets and 0D Co nanoparticles (denoted as Co@Co 2 Mo 3 O 8 ) have been in-situ synthesized and introduced into the hydrolysis of AB for the first time. Excitingly, the novel Co@Co 2 Mo 3 O 8 exhibits one of the best catalytic performances in the hydrolysis of AB for non-noble metal/metal oxide heterojunction catalysts with TOF value reaching 17.28 m o l H 2 m o l ca t - 1 m i n - 1 at 25 °C, which is 3.95 and 24.0 times that of the single Co 2 Mo 3 O 8 and Co. Meanwhile, two kinds of catalytic components with high intrinsic activity (Co 2 Mo 3 O 8 and Co) and supporting each other in the 0D/1D/2D spatial structure (nanoparticles, microrods, and nanosheets) along with plentiful O vacancies induce the outstanding catalytic activity of Co@Co 2 Mo 3 O 8 . The large-scale controllable preparation method for in-situ fabrication of non-noble metal 0D/1D/2D composite catalysts with high performances would be an accelerator for great potential application for hydrolysis of AB.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 17
·9996-10005
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IF 3.119
Xueying Qiu,Jiaxi Liu,Pengru Huang,Shujun Qiu,Chaoming Weng,Hailiang Chu,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun
Ammonia borane (AB, NH3BH3) with extremely high hydrogen content (19.6 wt%) is considered to be one of the most promising chemical hydrides for storing hydrogen. According to the starting materials of AB and H2O, a hydrogen capacity of 7.8 wt% is achieved for the AB hydrolytic dehydrogenation system with the presence of a highly efficient catalyst. In this work, ruthenium nanoparticles supported on magnesium–aluminum layered double hydroxides (Ru/MgAl-LDHs) were successfully synthesized via a simple method, i.e., chemical reduction. The effect of Mg/Al molar ratios in MgAl-LDHs on the catalytic performance for AB hydrolytic dehydrogenation was systematically investigated. Catalyzed by the as-synthesized Ru/Mg1Al1-LDHs catalyst, it took about 130 s at room temperature to complete the hydrolysis reaction of AB, which achieved a rate of hydrogen production of about 740 ml s−1 g−1. Furthermore, a relatively high activity (TOF = 137.1 molH2 molRu−1 min−1), low activation energy (Ea = 30.8 kJ mol−1) and fairly good recyclability of the Ru/Mg1Al1-LDHs catalyst in ten cycles were achieved toward AB hydrolysis for hydrogen generation. More importantly, the mechanism of AB hydrolysis catalyzed by Ru/MgAl-LDHs was simulated via density functional theory. The facile preparation and high catalytic performance of Ru/MgAl-LDHs make it an efficient catalyst for hydrolytic dehydrogenation of AB.
研究领域:
化学
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材料科学
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催化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Ying-Hua Zhou,Xingyun Cao,Jingzhu Ning,Changchun Ji,Yong Cheng,Jing Gu
To exploit the low-cost and efficient catalyst for the hydrolytic dehydrogenation of ammonia borane , trace amount of palladium-doped transition metal (Cu, Ni, Co, Fe and Zn) nanoparticles have been incorporated into the interior of metal-organic frameworks named ZIF-8, ZIF-67, ZIF-67/ZIF-8 and core-shell ZIF-67@ZIF-8 by a double-solvent approach. The optimized catalyst of CuPd 0.01 @ZIF-67@ZIF-8 composite exhibited an excellent activity with a turnover frequency (TOF) value of 30.15 mol H 2 (mol metal ) −1 min −1 at 298 K and a relatively low activation energy of 38.78 kJ mol −1 . It might attributed to both ultrafine size of metal nanoparticles (~3 nm) induced by the confinement of core-shell ZIF-67@ZIF-8 and the synergistic effect between Pd and Cu. Moreover, the detailed kinetic study has manifested that this catalytic reaction is first-order in regards to the catalyst amount while zero-order as for the concentration of ammonia borane. In addition, the durability and recyclability of CuPd 0.01 @ZIF-67@ZIF-8 have been demonstrated to be great.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
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2019
·Vol. 11
·期 9
·2362-2369
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IF 4.495
Xue Zhao,Yunfan Fu,Chen Yao,Shuran Xu,Yu Shen,Qiong Ding,Wenjing Liu,Haibo Zhang,Xiaohai Zhou
Graphical A closo case : In situ preparation of ultrafine Pd and Pt nanoparticles on dodecahydro-closo-dodecaborate organic polymers for high efficiency catalytic hydrolytic dehydrogenation of ammonia borane. Using in situ reduction strategy by combining organic frameworks and ultrafine Pd and Pt nanoparticles (Pd−NPs and Pt−NPs) to synthesize composites with tunable morphology and high dispersion has attracted extensive attentions in fabrication of composite nanomaterials. Herein, on the new kind of substrate, BOPs@Pd and BOPs@Pt nano materials have been successfully fabricated via in situ reduction of Na 2 PdCl 4 and H 2 PtCl 6 triggered by reducibility of organic boron polymers (BOPs). The final products are obtained by loading Pd−NPs and Pt−NPs with ultra-small size and high dispersion without any tedious chemical modification or additional additives. These materials show high catalytic activity and recyclability in the hydrolysis dehydrogenation of ammonia borane (AB).
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·
IF 4.229
Manyi Gao,Weiwei Yang,Yongsheng Yu
Pt-M alloy nanoparticles (NPs) with well-defined size and compositions exhibit dramatically catalytic performance in chemical reactions. In this work, monodisperse PtCu NPs with controlled size and compositions were synthesized by the co-reduction method in the presence of oleylamine. These NPs have excellent catalytic activities in the hydrolytic dehydrogenation of ammonia borane (AB) and their activities were composition dependent. Among the different-composition PtCu NPs, the Cu 50 Pt 50 NPs exhibit the highest catalytic activity with an initial turnover frequency of 102.5 mol (hydrogen) ·mol (catalyst) −1 ·min −1 and an apparent activation energy of 36 kJ·mol −1 , which demonstrate the validity of partly replacing Pt by a first-row transition metal on constructing high performance heterogeneous nanocatalysts for the hydrolytic dehydrogenation of AB.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）