公开(公告)号：US10784518B2

公开(公告)日：2020-09-22

申请号：US15572563

申请日：2016-05-12

Applicant: Northeastern University

Inventor： Sanjeev Mukerjee ,  Michael Bates ,  Shraboni Ghoshal ,  Huong Thi Thanh Doan

IPC: H01M4/92 ,  H01M8/18 ,  C25B1/02 ,  H01M4/88 ,  C25B11/04 ,  H01M8/1018

Abstract: The invention provides a nitrogen-functionalized platinum-transition metal catalyst having the formula Pt-M-NX/C (where M is a transition element such as Fe, Co, Ni, Nb, Ta, Ir, Rh, or Ru) for use at the hydrogen electrode of a hydrogen/bromine redox flow battery. The new catalyst possesses excellent activity and durability in the HBr/Br2 environment, showing superior resistance to halide poisoning than conventional Pt/C or Pt-M/C catalysts.

公开(公告)号：US11969713B2

公开(公告)日：2024-04-30

申请号：US17783886

申请日：2020-12-21

Applicant: Northeastern University

Inventor： Sanjeev Mukerjee ,  Robert Allen ,  Huong Thi Thanh Doan ,  Ian Kendrick

IPC: B01J23/755 ,  B01J21/18 ,  B01J35/00 ,  B01J35/10 ,  H01M8/0656

CPC classification number: B01J23/755 ,  B01J21/18 ,  B01J35/0013 ,  B01J35/1028 ,  H01M8/0656

Abstract: Functionalized catalysts for use in a hydrogen evolution reaction (HER) contain nanoparticles containing a transition metal enveloped in layers of graphene, which renders the nanoparticles resistant to passivation while maintaining an optimal ratio of transition metal and transition metal oxide in the nanoparticles. The catalysts can be utilized with anionic exchange polymer membranes for hydrogen production by alkaline water electrolysis.

公开(公告)号：US10854885B2

公开(公告)日：2020-12-01

申请号：US15774409

申请日：2016-12-29

Applicant: Northeastern University

Inventor： Jingkun Li ,  Sanjeev Mukerjee

IPC: H01M4/90 ,  B01J31/16 ,  B01J31/18 ,  C25B11/04 ,  H01M4/86 ,  H01M4/88

Abstract: A simplified and efficient method for preparing non-noble metal catalysts for oxygen reduction reaction (ORR) based on nitrogen containing metal organic framework (MOF) is provided. The method includes formation of a first MOF product through a mechano-chemical reaction between a first transition metal compound and a first organic ligand in the presence of a catalyst. It further includes formation of a second MOF product incorporating a second transition metal and a second organic ligand into the first-MOF product. The second MOF product is converted into an electrocatalyst via pyrolysis, and optionally post-treatment. The electrocatalysts are applicable in various electrochemical systems, including oxygen depolarized cathodes (ODC) for chlorine evolution.

公开(公告)号：US10418639B2

公开(公告)日：2019-09-17

申请号：US14758857

申请日：2014-01-07

Applicant: Northeastern University

Inventor： Urszula Tylus ,  Sanjeev Mukerjee ,  Elise Miner ,  Kara Strickland

IPC: H01M4/88 ,  H01M4/86 ,  C25B1/34 ,  C07F15/02 ,  C25B11/04 ,  C25B1/26 ,  H01M4/90 ,  H01M8/086

Abstract: Highly anion resistant electrocatalysts suitable for catalyzing an oxygen reduction reaction (ORR) and methods of synthesizing the same are provided. The catalysts contain a transition metal, a heteroatom, and carbon. Preferred catalysts include N as the heteroatom and Fe as the transition metal, with active sites having Fe—N4 stoichiometry (FexNyCz) as part of a metal organic framework (MOF) or sequestered within a MOF. Electrocatalysts further including Fe nanoparticles (FeNPs) are also provided. The catalysts described herein are applicable in the preparation of oxygen decoupled cathodes (ODC) for chlorine evolution processes such as in chlor-alkali cells or HCl electrolyzers. The catalysts are also useful in preparing ODC for use in fuel cells, including phosphoric acid fuel cells.