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Functionalized Catalysts for the Hyd...

Doan, Huong.

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Functionalized Catalysts for the Hydrogen Evolution Reactions in Alkaline High pH or Hydrogen Oxidation Reactions in Halide Poisoning Environment.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Functionalized Catalysts for the Hydrogen Evolution Reactions in Alkaline High pH or Hydrogen Oxidation Reactions in Halide Poisoning Environment./
作者:	Doan, Huong.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	172 p.
附註:	Source: Dissertation Abstracts International, Volume: 80-09(E), Section: B.
Contained By:	Dissertation Abstracts International80-09B(E).
標題:	Chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13862252
ISBN:	9781392088920

Functionalized Catalysts for the Hydrogen Evolution Reactions in Alkaline High pH or Hydrogen Oxidation Reactions in Halide Poisoning Environment.
Doan, Huong.

Functionalized Catalysts for the Hydrogen Evolution Reactions in Alkaline High pH or Hydrogen Oxidation Reactions in Halide Poisoning Environment. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 172 p.

Source: Dissertation Abstracts International, Volume: 80-09(E), Section: B.

Thesis (Ph.D.)--Northeastern University, 2019.

Platinum has been used extensively for H2 production until recently, but there has been research on finding a cheaper metal for the process to make it more practical in industry. The aim of this research is primarily focused on synthesizing an inexpensive Ni catalyst for hydrogen evolution reaction (HER) in the context of a water-splitting cell (alkaline pH). To minimize the aggressive passivation towards Ni in alkaline media, a simple synthesis method (one-pot synthesis method) to functionalize the surface of a Ni catalyst was used, wherein this surface was engineered to have protected layers surrounding the metal particle.

ISBN: 9781392088920Subjects--Topical Terms:

516420
Chemistry.

Functionalized Catalysts for the Hydrogen Evolution Reactions in Alkaline High pH or Hydrogen Oxidation Reactions in Halide Poisoning Environment.
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300 $a 172 p.
500 $a Source: Dissertation Abstracts International, Volume: 80-09(E), Section: B.
500 $a Adviser: Sanjeev Mukerjee.
502 $a Thesis (Ph.D.)--Northeastern University, 2019.
520 $a Platinum has been used extensively for H2 production until recently, but there has been research on finding a cheaper metal for the process to make it more practical in industry. The aim of this research is primarily focused on synthesizing an inexpensive Ni catalyst for hydrogen evolution reaction (HER) in the context of a water-splitting cell (alkaline pH). To minimize the aggressive passivation towards Ni in alkaline media, a simple synthesis method (one-pot synthesis method) to functionalize the surface of a Ni catalyst was used, wherein this surface was engineered to have protected layers surrounding the metal particle.
520 $a This research includes the development of Ni-functionalized/K600 via a rapid one-pot solvo-chemical method using a chelator to sequester Ni in aqueous solution. The functionalized Ni surface contains an efficient amount of Ni0 and NiOx active sites for H-adsorption and OH-adsorption, respectively, without passivating the catalyst. The original ratio of Ni0:NiOx is maintained due to the protection of Ni0 sites by several layers of graphene introduced during synthesis. The presence of the graphene layers was confirmed by high-resolution transmission electron microscopy (HR-TEM) while the material's resistance to passivation was demonstrated by in-situ X-ray absorption spectroscopy studies.
520 $a The stability and activity of the functionalized Ni catalyst were demonstrated in half-cell RDE, practical AEM--H2 pump cell and AEM--electrolyzer cell. Using the RDE stability results, a kinetic study was conducted to fit in a model that was built using a non-linear, least-square method program. As a result, the kinetic parameters such as hydride and hydroxide coverages on the Ni surface were calculated. These hydride and hydroxide coverages were used to predict the HER activity of half-cell reaction in the AEM--H 2 pump cell and AEM--electrolyzer cell. In the case of the AEM--H 2 pump cell, the Ni-functionalized/K600 outperformed a Pt/C catalyst for the first time. Next, the Ni-functionalized/K600, which was assembled in a scale-up AEM--electrolyzer cell at Proton On-Site, Wallington, CT, was run as the cathode while the anode used Ni-Fe/Raney-PANI, which was also a non-PGM catalyst for OER. The exceptionally stable performance of this non-PGM cell, which enabled a low-cost H2 production consistently for 1,000 hours, was documented for the first time.
520 $a Finally, Pt and Ir particles covered by ultra-thin layers of carbon moieties (UTLCM), synthesized via a similar chelating method as Ni-functionalized/K600, were reported to have a high tolerance towards bromine/bromide poisoning. The presence of the UTLCM was confirmed by HR-TEM as well as X-ray photoelectron spectroscopy. The Pt-Ir alloy nanoparticle/C was used in an H2-Br2 RFB context in replacement of Pt/C.
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