PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor

Hayashida, Naoyuki; Kim, Hyo Jin; Shun, Kazuki; Yoshida, Hideto; Nakano, Takayoshi; Mori, Kohsuke

doi:https://doi.org/10.1021/acsaem.6c00086

PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor

Hayashida, Naoyuki; Kim, Hyo Jin; Shun, Kazuki et al.

ACS Applied Energy Materials, 2026, 9(8), 4887-4896

アクセス数:6件（2026-06-15 17:12 集計）

固定URL: https://hdl.handle.net/11094/104911

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タイトル	PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor
著者	著者名 Hayashida, Naoyuki
	著者名 Kim, Hyo Jin
	ORCID 0009-0005-3669-8513 0009-0005-3669-8513 researchmap permalink 87364816 87364816 Scopus Author ID 57216689610 57216689610 著者名 Shun, Kazuki
	NRID 1000000452425 1000000452425 ORCID 0000-0002-4195-3225 0000-0002-4195-3225 researchmap permalink read0204918 read0204918 Scopus Author ID 55324307600 55324307600 著者名 Yoshida, Hideto
	NRID 1000030243182 1000030243182 ORCID 0000-0001-8052-1698 0000-0001-8052-1698 researchmap permalink read0013987 read0013987 Scopus Author ID 7403896013 7403896013 著者名 Nakano, Takayoshi
	NRID 1000090423087 1000090423087 ORCID 0000-0003-3915-4528 0000-0003-3915-4528 researchmap permalink 7000018582 7000018582 Scopus Author ID 35426128700 35426128700 著者名 Mori, Kohsuke
キーワード等	catalytic reactor
	formic acid
	metal 3D-printing
	Na₂Ti₃O₇
	PdAg alloy nanoparticles
内容	Hayashida N., Kim H.J., Shun K., et al. PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor. ACS Applied Energy Materials 9(8), 4887–4896 (2026); https://doi.org/10.1021/acsaem.6c00086.
抄録	Formic acid (FA: HCOOH) has emerged as a promising hydrogen storage material because of its high hydrogen storage density and ease of handling. Thus, a practical and rational heterogeneous catalyst for FA synthesis via liquid-phase CO₂ hydrogenation is highly expected. In this study, we first prepared PdAg alloy nanoparticles (NPs) supported on Na₂Ti₃O₇ via simple ion-exchange followed by chemical reduction. These powdered specimens promote the efficient selective hydrogenation of CO₂ to give FA even under mild reaction conditions. The attack of the dissociated H atom on the HCO₃– intermediate was found to be the rate-determining step, which is facilitated by PdAg alloy NPs with a low Pd/Ag ratio. The insights obtained from the powdered specimens were subsequently applied to the design of a self-catalytic reactor fabricated using metal three-dimensional (3D)-printing technology. Oxidation and hydrothermal treatment under alkaline conditions of cylindrical-shaped Ti-based catalytic reactors produced Na₂Ti₃O₇ nanofibers on their surface, which further enabled the deposition of PdAg NPs via ion-exchange followed by chemical reduction, and facilitated the liquid-phase CO₂ hydrogenation into FA. We also investigated the influence of 3D-printing scan strategies on the microstructure and catalytic performance by changing the laser scan direction.
出版者	American Chemical Society
収録物名	ACS Applied Energy Materials
巻(号)	9(8)
ページ	4887-4896
刊行年月	2026-03-28
言語	英語
ハンドルURL	https://hdl.handle.net/11094/104911
eISSN	25740962
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1021/acsaem.6c00086
アクセス権	embargoed access
権利情報	This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Appl. Energy Mater., © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsaem.6c00086.
権利情報	The full-text file will be made open to the public on 28 March 2027 in accordance with the publisher's policy.
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	ACS Applied Energy Materials. 2026, 9(8), p. 4887-4896
DC.title	PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor
DC.creator	Hayashida, Naoyuki
	Kim, Hyo Jin
	Shun, Kazuki
	Yoshida, Hideto
	Nakano, Takayoshi
	Mori, Kohsuke
DC.publisher	American Chemical Society
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2026-03-28
DC.identifier	https://doi.org/10.1021/acsaem.6c00086
DC.subject	catalytic reactor
	formic acid
	metal 3D-printing
	Na₂Ti₃O₇
	PdAg alloy nanoparticles
DC.description	Hayashida N., Kim H.J., Shun K., et al. PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor. ACS Applied Energy Materials 9(8), 4887–4896 (2026); https://doi.org/10.1021/acsaem.6c00086.
DCTERMS.abstract	Formic acid (FA: HCOOH) has emerged as a promising hydrogen storage material because of its high hydrogen storage density and ease of handling. Thus, a practical and rational heterogeneous catalyst for FA synthesis via liquid-phase CO₂ hydrogenation is highly expected. In this study, we first prepared PdAg alloy nanoparticles (NPs) supported on Na₂Ti₃O₇ via simple ion-exchange followed by chemical reduction. These powdered specimens promote the efficient selective hydrogenation of CO₂ to give FA even under mild reaction conditions. The attack of the dissociated H atom on the HCO₃– intermediate was found to be the rate-determining step, which is facilitated by PdAg alloy NPs with a low Pd/Ag ratio. The insights obtained from the powdered specimens were subsequently applied to the design of a self-catalytic reactor fabricated using metal three-dimensional (3D)-printing technology. Oxidation and hydrothermal treatment under alkaline conditions of cylindrical-shaped Ti-based catalytic reactors produced Na₂Ti₃O₇ nanofibers on their surface, which further enabled the deposition of PdAg NPs via ion-exchange followed by chemical reduction, and facilitated the liquid-phase CO₂ hydrogenation into FA. We also investigated the influence of 3D-printing scan strategies on the microstructure and catalytic performance by changing the laser scan direction.
DC.rights	This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Appl. Energy Mater., © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsaem.6c00086.
DC.rights	The full-text file will be made open to the public on 28 March 2027 in accordance with the publisher's policy.
DC.format	104911
citation_title	PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor
citation_author	Hayashida, Naoyuki
	Kim, Hyo Jin
	Shun, Kazuki
	Yoshida, Hideto
	Nakano, Takayoshi
	Mori, Kohsuke
citation_publisher	American Chemical Society
citation_language	英語
citation_date	2026-03-28
citation_journal_title	ACS Applied Energy Materials
citation_volume	9
citation_issue	8
citation_firstpage	4887
citation_lastpage	4896
citation_doi	https://doi.org/10.1021/acsaem.6c00086
citation_public_url	https://hdl.handle.net/11094/104911

PdAg Nanoparticles Supported on Na₂Ti₃O₇ for CO₂ Hydrogenation into Formic Acid: Expanding Catalyst Design from Powder to a Metal 3D-Printed Self-Catalytic Reactor

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