Use of Alumina Supported Co-P and Ni-P Catalysts Synthesized By Electroless Plating Method in NaBH4 Hydrolysis

Ebru Arınan; Meltem Dogan; Duygu Uysal; Özkan Murat Doğan

Makale detayları

Use of Alumina Supported Co-P and Ni-P Catalysts Synthesized By Electroless Plating Method in NaBH4 Hydrolysis

Yazarlar:

Ebru Arınan | Meltem Dogan | Duygu Uysal | Özkan Murat Doğan

Yayıncı:

Gazi University

Ana Başlıklar:

Catalytic Activity | Chemical Engineering (Other)

Dergi:

Gazi University Journal of Science Vol.38 Issue 3, pp.1159-1176

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356590

pISSN:

2147-1762

Anahtar kelimeler:

Özet:

 In this study, catalyst synthesis with a long service life and high activity by hydrolysis was aimed at using NaBH4, which is used as a hydrogen storage. Commercial alumina is used as a catalyst support, and Co-P and Ni-P loadings were done using the electroless plating method. The characterization was done using XRD and SEMEDS analyses. In Co-P catalyst, the ratio of metalP P weight was determined as 2.5, whilst that of Ni-P was 1.2. Both synthesized catalysts had P and metallic forms as well as metal-P alloy structures. Co-P-based catalysts showed higher activity than Ni-P catalysts in hydrogen production from NaBH4 via hydrolysis. The high CoP ratio explained high activity in the Co-Palumina catalyst, and more Pd 9.36 by mass was detected on the catalyst surface. Regarding Co-Palumina catalyst, the effects of NaBH4 concentration, NaOH concentration and reaction temperature on the amount of hydrogen produced and the production rate were examined. The hydrogen production rate increased with increasing NaBH4 concentration up to a specific value 0.3 M, after that, no significant change was observed, which is explained by the increase in viscosity caused by the by-product NaBO2, its strong adsorption to the catalyst surface, hence the closure of active centers. NaOH concentration had not significantly affected the hydrogen production amount and rate for the selected operating conditions. As the temperature was increased from 20C to 60C, the hydrogen production rate increased approximately three times, and the activation energy was calculated as 25 kJmol. In repeat experiments, 74 of the initial performance was preserved after the tenth use.

 In this study, catalyst synthesis with a long service life and high activity by hydrolysis was aimed at using NaBH4, which is used as a hydrogen storage. Commercial alumina is used as a catalyst support, and Co-P and Ni-P loadings were done using the electroless plating method. The characterization was done using XRD and SEMEDS analyses. In Co-P catalyst, the ratio of metalP P weight was determined as 2.5, whilst that of Ni-P was 1.2. Both synthesized catalysts had P and metallic forms as well as metal-P alloy structures. Co-P-based catalysts showed higher activity than Ni-P catalysts in hydrogen production from NaBH4 via hydrolysis. The high CoP ratio explained high activity in the Co-Palumina catalyst, and more Pd 9.36 by mass was detected on the catalyst surface. Regarding Co-Palumina catalyst, the effects of NaBH4 concentration, NaOH concentration and reaction temperature on the amount of hydrogen produced and the production rate were examined. The hydrogen production rate increased with increasing NaBH4 concentration up to a specific value 0.3 M, after that, no significant change was observed, which is explained by the increase in viscosity caused by the by-product NaBO2, its strong adsorption to the catalyst surface, hence the closure of active centers. NaOH concentration had not significantly affected the hydrogen production amount and rate for the selected operating conditions. As the temperature was increased from 20C to 60C, the hydrogen production rate increased approximately three times, and the activation energy was calculated as 25 kJmol. In repeat experiments, 74 of the initial performance was preserved after the tenth use.

 In this study, catalyst synthesis with a long service life and high activity by hydrolysis was aimed at using NaBH4, which is used as a hydrogen storage. Commercial alumina is used as a catalyst support, and Co-P and Ni-P loadings were done using the electroless plating method. The characterization was done using XRD and SEMEDS analyses. In Co-P catalyst, the ratio of metalP P weight was determined as 2.5, whilst that of Ni-P was 1.2. Both synthesized catalysts had P and metallic forms as well as metal-P alloy structures. Co-P-based catalysts showed higher activity than Ni-P catalysts in hydrogen production from NaBH4 via hydrolysis. The high CoP ratio explained high activity in the Co-Palumina catalyst, and more Pd 9.36 by mass was detected on the catalyst surface. Regarding Co-Palumina catalyst, the effects of NaBH4 concentration, NaOH concentration and reaction temperature on the amount of hydrogen produced and the production rate were examined. The hydrogen production rate increased with increasing NaBH4 concentration up to a specific value 0.3 M, after that, no significant change was observed, which is explained by the increase in viscosity caused by the by-product NaBO2, its strong adsorption to the catalyst surface, hence the closure of active centers. NaOH concentration had not significantly affected the hydrogen production amount and rate for the selected operating conditions. As the temperature was increased from 20C to 60C, the hydrogen production rate increased approximately three times, and the activation energy was calculated as 25 kJmol. In repeat experiments, 74 of the initial performance was preserved after the tenth use.

 In this study, catalyst synthesis with a long service life and high activity by hydrolysis was aimed at using NaBH4, which is used as a hydrogen storage. Commercial alumina is used as a catalyst support, and Co-P and Ni-P loadings were done using the electroless plating method. The characterization was done using XRD and SEMEDS analyses. In Co-P catalyst, the ratio of metalP P weight was determined as 2.5, whilst that of Ni-P was 1.2. Both synthesized catalysts had P and metallic forms as well as metal-P alloy structures. Co-P-based catalysts showed higher activity than Ni-P catalysts in hydrogen production from NaBH4 via hydrolysis. The high CoP ratio explained high activity in the Co-Palumina catalyst, and more Pd 9.36 by mass was detected on the catalyst surface. Regarding Co-Palumina catalyst, the effects of NaBH4 concentration, NaOH concentration and reaction temperature on the amount of hydrogen produced and the production rate were examined. The hydrogen production rate increased with increasing NaBH4 concentration up to a specific value 0.3 M, after that, no significant change was observed, which is explained by the increase in viscosity caused by the by-product NaBO2, its strong adsorption to the catalyst surface, hence the closure of active centers. NaOH concentration had not significantly affected the hydrogen production amount and rate for the selected operating conditions. As the temperature was increased from 20C to 60C, the hydrogen production rate increased approximately three times, and the activation energy was calculated as 25 kJmol. In repeat experiments, 74 of the initial performance was preserved after the tenth use.

Makale detayları

Use of Alumina Supported Co-P and Ni-P Catalysts Synthesized By Electroless Plating Method in NaBH4 Hydrolysis

Yazarlar:

Ebru Arınan | Meltem Dogan | Duygu Uysal | Özkan Murat Doğan

Yayıncı:

Gazi University

Ana Başlıklar:

Catalytic Activity | Chemical Engineering (Other)

Dergi:

Gazi University Journal of Science Vol.38 Issue 3, pp.1159-1176

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356590

pISSN:

2147-1762

Sodium Borohydride

Hydrogen

Catalyst

ELP (electroless plating)

Sayı

Makale detayları

Use of Alumina Supported Co-P and Ni-P Catalysts Synthesized By Electroless Plating Method in NaBH4 Hydrolysis

Yazarlar: Ebru Arınan | Meltem Dogan | Duygu Uysal | Özkan Murat Doğan

Yayıncı: Gazi University

Ana Başlıklar: Catalytic Activity | Chemical Engineering (Other)

Dergi: Gazi University Journal of Science Vol.38 Issue 3, pp.1159-1176

Belge Tipi: Makale

Yayın Tarihi: 1/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001356590

pISSN: 2147-1762

Sodium Borohydride

Hydrogen

Catalyst

ELP (electroless plating)

Sayı

Yazarlar:

Ebru Arınan | Meltem Dogan | Duygu Uysal | Özkan Murat Doğan

Yayıncı:

Gazi University

Ana Başlıklar:

Catalytic Activity | Chemical Engineering (Other)

Dergi:

Gazi University Journal of Science Vol.38 Issue 3, pp.1159-1176

Belge Tipi:

Makale

Yayın Tarihi:

1/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356590

pISSN:

2147-1762