3a2ecc24e5b46c2df619206e7568f8d9 nanomaterials-14-01849-v2.pdf 83fd95432d3d3e07498a1395a7b5ed435149c1a0 nanomaterials-14-01849-v2.pdf 51a5fc14eeade692b78430c2f0adc265793816191f1cb0c81a76a9486553ac8c nanomaterials-14-01849-v2.pdf Title: Free-Standing Carbon Nanofiber Films with Supported Cobalt Phosphide Nanoparticles as Cathodes for Hydrogen Evolution Reaction in a Microbial Electrolysis Cell Subject: High-performance and cost-efficient electrocatalysts and electrodes are needed to improve the hydrogen evolution reaction (HER) for the hydrogen (H2) generation in electrolysers, including microbial electrolysis cells (MECs). In this study, free-standing carbon nanofiber (CNF) films with supported cobalt phosphide nanoparticles have been prepared by means of an up-scalable electrospinning process followed by a thermal treatment under controlled conditions. The produced cobalt phosphide-supported CNF films show to be nanoporous (pore volume up to 0.33 cm3 g-1) with a high surface area (up to 502 m2 g-1) and with a suitable catalyst mass loading (up to 0.49 mg cm-2). Values of overpotential less than 140 mV at 10 mA cm-2 have been reached for the HER in alkaline media (1 M KOH), which demonstrates a high activity. The high electrical conductivity together with the mechanical stability of the free-standing CNF films allowed their direct use as cathodes in a MEC reactor, resulting in an exceptionally low voltage operation (0.75 V) with a current density demand of 5.4 A m-2. This enabled the production of H2 with an energy consumption below 30 kWh kg-1 H2, which is highly efficient. Keywords: electrospinning; electrocatalyst; cobalt phosphide; carbon nanofiber (CNF); nanoparticles; free-standing films; cathodes; hydrogen evolution reaction (HER); microbial electrolysis cells (MECs) Author: Gerard Pérez-Pi, Jorge Luque-Rueda, Pau Bosch-Jimenez, Eduard Borràs Camps and Sandra Martínez-Crespiera Creator: LaTeX with hyperref Producer: pdfTeX-1.40.25 CreationDate: Wed Nov 20 04:01:20 2024 CET ModDate: Wed Nov 20 09:17:17 2024 CET Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 17 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 6124957 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- GGHKEL+VnURWPalladioL-Bold Type 1 Custom yes yes yes 10 0 AWTWHV+URWPalladioL-Bold Type 1 Custom yes yes yes 16 0 DNFOIB+URWPalladioL-Roma Type 1 Custom yes yes yes 22 0 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BBECHJ+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 359 0 BBECHK+PalatinoLinotype CID TrueType Identity-H yes yes yes 362 0 BBECHL+PalatinoLinotype TrueType WinAnsi yes yes no 368 0 BBECLL+PalatinoLinotype TrueType MacRoman yes yes no 371 0 BBECHH+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 381 0 BBECHJ+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 384 0 BBECHK+PalatinoLinotype CID TrueType Identity-H yes yes yes 387 0 BBECHL+PalatinoLinotype TrueType WinAnsi yes yes no 393 0 BBECLL+PalatinoLinotype TrueType MacRoman yes yes no 396 0 BBEFNO+PalatinoLinotype,BoldItalic TrueType WinAnsi yes yes no 410 0 BBECHH+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 413 0 BBECHJ+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 416 0 BBECHK+PalatinoLinotype CID TrueType Identity-H yes yes yes 419 0 BBECHL+PalatinoLinotype TrueType WinAnsi yes yes no 425 0 BBECLL+PalatinoLinotype TrueType MacRoman yes yes no 428 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-12-13 02:49:08 CET RepresentationInformation: nanomaterials-14-01849-v2.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2024-12-05 11:51:26 CET Size: 6124957 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 596 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Materials and Methods Destination: section.2 Children: Item: Title: Materials for Synthesis Destination: subsection.2.1 Item: Title: Synthesis of Free-Standing Cobalt Phosphide-Supported CNF Films Destination: subsection.2.2 Item: Title: Physicochemical Characterization Destination: subsection.2.3 Item: Title: Electrochemical Characterization Destination: subsection.2.4 Item: Title: Calculations Destination: subsection.2.5 Item: Title: Results and Discussion Destination: section.3 Children: Item: Title: Synthesis Destination: subsection.3.1 Item: Title: Physicochemical Characterizations Destination: subsection.3.2 Item: Title: Electrochemical Characterizations Destination: subsection.3.3 Item: Title: Electrochemical Stability Evaluation Destination: subsection.3.4 Item: Title: In Situ Bio-Electrochemical Reactor Testing Destination: subsection.3.5 Item: Title: Conclusions Destination: section.4 Item: Title: References Destination: section.5 Info: Title: Free-Standing Carbon Nanofiber Films with Supported Cobalt Phosphide Nanoparticles as Cathodes for Hydrogen Evolution Reaction in a Microbial Electrolysis Cell Author: Gerard Pérez-Pi, Jorge Luque-Rueda, Pau Bosch-Jimenez, Eduard Borràs Camps and Sandra Martínez-Crespiera Subject: High-performance and cost-efficient electrocatalysts and electrodes are needed to improve the hydrogen evolution reaction (HER) for the hydrogen (H2) generation in electrolysers, including microbial electrolysis cells (MECs). In this study, free-standing carbon nanofiber (CNF) films with supported cobalt phosphide nanoparticles have been prepared by means of an up-scalable electrospinning process followed by a thermal treatment under controlled conditions. The produced cobalt phosphide-supported CNF films show to be nanoporous (pore volume up to 0.33 cm3 g-1) with a high surface area (up to 502 m2 g-1) and with a suitable catalyst mass loading (up to 0.49 mg cm-2). Values of overpotential less than 140 mV at 10 mA cm-2 have been reached for the HER in alkaline media (1 M KOH), which demonstrates a high activity. The high electrical conductivity together with the mechanical stability of the free-standing CNF films allowed their direct use as cathodes in a MEC reactor, resulting in an exceptionally low voltage operation (0.75 V) with a current density demand of 5.4 A m-2. This enabled the production of H2 with an energy consumption below 30 kWh kg-1 H2, which is highly efficient. Keywords: electrospinning; electrocatalyst; cobalt phosphide; carbon nanofiber (CNF); nanoparticles; free-standing films; cathodes; hydrogen evolution reaction (HER); microbial electrolysis cells (MECs) Creator: LaTeX with hyperref Producer: pdfTeX-1.40.25 CreationDate: Wed Nov 20 04:01:20 CET 2024 ModDate: Wed Nov 20 09:17:17 CET 2024 ID: 0x24927208a08912f9d27db1c910ef0707, 0x24927208a08912f9d27db1c910ef0707 Filters: FilterPipeline: FlateDecode Fonts: Type1: Font: BaseFont: XFIZIB+CMSY10 FontSubset: true FirstChar: 0 LastChar: 14 FontDescriptor: FontName: XFIZIB+CMSY10 Flags: Symbolic FontBBox: -29, -960, 1116, 775 FontFile: true ToUnicode: true Font: BaseFont: AWTWHV+URWPalladioL-Bold FontSubset: true FirstChar: 2 LastChar: 134 FontDescriptor: FontName: AWTWHV+URWPalladioL-Bold Flags: Symbolic FontBBox: -152, -301, 1000, 935 FontFile: true EncodingDictionary: Differences: true ToUnicode: true Font: BaseFont: XIRVNA+EURB10 FontSubset: true FirstChar: 22 LastChar: 22 FontDescriptor: 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