Volume 44, Issue 12 pp. 9748-9756
SPECIAL ISSUE RESEARCH ARTICLE

Green synthesis of porous Ni-silicate catalyst for hydrogen generation via ammonia decomposition

Yun-Ying Chen

Yun-Ying Chen

Department of Chemistry, National Cheng Kung University, Tainan, Taiwan

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Yi-Chieh Chang

Yi-Chieh Chang

Department of Chemistry, National Cheng Kung University, Tainan, Taiwan

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Wei-Ying Hung

Wei-Ying Hung

Department of Chemistry, National Cheng Kung University, Tainan, Taiwan

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Hong-Ping Lin

Corresponding Author

Hong-Ping Lin

Department of Chemistry, National Cheng Kung University, Tainan, Taiwan

Correspondence

Hong-Ping Lin, Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan.

Email: [email protected]

Chun-Han Hsu, National Tainan Junior College of Nursing, Tainan 700, Taiwan.

Email: [email protected]

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Hui-Ya Shih

Hui-Ya Shih

Advanced Process Department, Advanced Precision Tech Division, Industrial Technology Research Institute Central Region Campus, Nantou, Taiwan

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Wen-An Xie

Wen-An Xie

Advanced Process Department, Advanced Precision Tech Division, Industrial Technology Research Institute Central Region Campus, Nantou, Taiwan

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Shou-Nan Li

Shou-Nan Li

Advanced Process Department, Advanced Precision Tech Division, Industrial Technology Research Institute Central Region Campus, Nantou, Taiwan

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Chun-Han Hsu

Corresponding Author

Chun-Han Hsu

National Tainan Junior College of Nursing, Tainan, Taiwan

Correspondence

Hong-Ping Lin, Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan.

Email: [email protected]

Chun-Han Hsu, National Tainan Junior College of Nursing, Tainan 700, Taiwan.

Email: [email protected]

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First published: 23 July 2020
Citations: 9

Funding information: Ministry of Science and Technology, Taiwan, Grant/Award Numbers: 108-2622-E-006-017-CC1, 108-2113-M-006-011

Summary

A simple synthetic method without organic template is proposed for the synthesis of Ni-silicate. The resulting Ni-phyllosilicates are reconstructed by hydrothermal treatment to a porous structure with a high surface area (552 m2 g−1). Notably, the residual filtrate has a Ni2+ ion content of less than 0.1 ppm, and therefore satisfies the effluent standard in Taiwan (<1.0 ppm). As a result, it can be disposed of directly without the need for additional treatment. The effects of the pH value and hydrothermal treatment time on the structure, morphology, and surface area of the Ni-silicate composites have been investigated. When applied to hydrogen production, the mesoporous Ni-silicate shows a high catalytic capability (>99%) toward ammonia decomposition at a temperature of 400°C. Overall, the proposed synthetic method is facile and easily extendable to the production of other metal-silicate materials for hydrogen generation.

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