Jacob Bonde
Technical University of Denmark
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Publication
Featured researches published by Jacob Bonde.
Faraday Discussions | 2009
Jacob Bonde; Poul Georg Moses; Thomas F. Jaramillo; Jens K. Nørskov; Ib Chorkendorff
The hydrogen evolution reaction (HER) on carbon supported MoS2 nanoparticles is investigated and compared to findings with previously published work on Au(111) supported MoS2. An investigation into MoS2 oxidation is presented and used to quantify the surface concentration of MoS2. Other metal sulfides with morphologies similar to MoS2 such as WS2, cobalt-promoted WS2, and cobalt-promoted MoS2 were also investigated in the search for improved HER activity. Experimental findings are compared to density functional theory (DFT) calculated values for the hydrogen binding energies (deltaGH) on each system.
Journal of The Electrochemical Society | 2009
Billie Abrams; Peter Christian Kjærgaard Vesborg; Jacob Bonde; Thomas F. Jaramillo; Ib Chorkendorff
Orbit (07/12/2018) Dynamics of Surface Exchange Reactions Between Au and Pt for HER and HOR Cyclic voltammetric analysis of the Pt-on-Au system for hydrogen evolution and oxidation reactions (HER/HOR) indicates that dynamic surface exchange reactions occur between Pt and Au. HER/HOR activities depend on the dominant surface species present, which is controllable by the potential applied to the system. Bulk Au is not very active for HER/HOR; however, when Pt is deposited onto the Au surface, the system becomes active. The Pt-on-Au system can subsequently be deactivated by cycling to potentials cathodic of the OH-adsorption and Pt-dissolution potentials (~+1.18 V vs normal hydrogen electrode, NHE, at pH 0). Following deactivation, the system can be reactivated by cycling above this potential, giving an activation potential of ~+1.0 V vs NHE. This deactivation/reactivation can be cycled repeatedly and occurs for various forms of the Pt-on-Au system. This potential-dependent surface exchange reaction is attributed to the lower surface energy of Au relative to Pt causing Au to migrate to the surface. When the system is deactivated, Au is present at the surface. However, Pt migrates back to the surface at higher positive potentials, where PtOx/PtOHx is formed, leading to adsorbate-induced surface segregation. The surface compositions were verified by X-ray photoelectron spectroscopy. Implications for electrocatalyst materials development for polymer electrolyte membrane fuel cells are discussed.
Science | 2007
Thomas F. Jaramillo; Kristina Pilt Jørgensen; Jacob Bonde; Jane Hvolbæk Nielsen; Sebastian Horch; Ib Chorkendorff
Journal of the American Chemical Society | 2005
Berit Hinnemann; Poul Georg Moses; Jacob Bonde; Kristina Pilt Jørgensen; Jane Hvolbæk Nielsen; Sebastian Horch; Ib Chorkendorff; Jens K. Nørskov
Nature Materials | 2006
Jeffrey Greeley; Thomas F. Jaramillo; Jacob Bonde; Ib Chorkendorff; Jens K. Nørskov
Journal of Physical Chemistry C | 2008
Thomas F. Jaramillo; Jacob Bonde; Jingdong Zhang; Bee-Lean Ooi; Klas Andersson; Jens Ulstrup; Ib Chorkendorff
Journal of Alloys and Compounds | 2005
Tejs Vegge; Lise S. Hedegaard-Jensen; Jacob Bonde; Ture R. Munter; Jens K. Nørskov
Fuel Cells | 2005
Jonathan Conrad Davies; Jacob Bonde; Ashildur Logadottir; Jens K. Nørskov; Ib Chorkendorff
Surface Science | 2009
Jane Hvolbæk Nielsen; Lone Bech; Kenneth Nielsen; Yann Tison; Kristina Pilt Jørgensen; Jacob Bonde; Sebastian Horch; Thomas F. Jaramillo; Ib Chorkendorff
Catalysis Today | 2015
Luděk Kaluža; Mikkel J. Larsen; Daniela Gulková; Zdeněk Vít; Olga Šolcová; Karel Soukup; Martin Koštejn; Jacob Bonde; Lucie Maixnerová; Madeleine Odgaard