Research Group


2022 Holiday gathering before group lunch at Dinosaur BBQ.


2022 Esposito group summer BBQ.


2021 Holiday gathering at Central Park ice skating rink.

Professor Dan Esposito
Group Advisoresposito220
Daniel (Dan) Esposito received his B.S. in Chemical Engineering from Lehigh University and his Ph.D. in Chemical Engineering at the University of Delaware. After studying as a postdoc at the National Institute of Standards and Technology (NIST), he became an Assistant Professor in the Department of Chemical Engineering at Columbia University. At Columbia, he leads the Solar Fuels Engineering Lab, which combines its expertise in electrochemical and catalytic sciences with core chemical engineering principles to develop design rules for innovative electrochemical and solar energy conversion technologies. Prof. Esposito is a recipient of the National Science Foundation CAREER award, and his lab receives funding from a combination of federal agencies and industrial sponsors.

E-mail: de2300(at)columbia(dot)edu

CV              Faculty Profile

Postdocs and Ph.D. students

Daniela Fraga Alvarez
Ph.D. Student


Daniela grew up in Quito, Ecuador and received her B.S in Chemical Engineering from Worcester Polytechnic Institute (WPI). She is a first year Ph.D student and her research interests are water electrolysis and electrochemical flow cells. Outside the lab, Daniela likes to exercise, bake cookies, and meet up with friends.

Will Stinson
Ph.D. Student

Will Stinson

Will grew up in New Hampshire and received his B.S in chemical engineering at Northeastern University. After spending 3+ years in industry researching Aluminum-seawater batteries, he returned to pursue his PhD degree. His research interests include local measurements of electro and photocatalysis. Outside of the lab, you can find Will climbing, playing soccer, or training for his next adventure/race.

Daniela Bushiri
Ph.D. Student

Daniela B

Daniela A. Bushiri received her B.S. in Chemical Engineering from New Jersey Institute of Technology. She is now an NSF Graduate Research Fellow and Provost Diversity Fellow at Columbia University with a research focus on developing electrocatalysts for Nitrates/Nitrogen conversion to Ammonia. Her project is co-advised by Dr. Chen. Outside of research, Daniela enjoys dancing to afrobeats, writing poetry and having deep conversations. Daniela is proudly Congolese/South African and cares deeply about the various issues in Africa, especially the energy crisis.

Lucas Cohen
Ph.D. Student


Lucas grew up in Bucks County, Pennsylvania and attended Northeastern University, where he received his B.S. in chemical engineering and physics. He is a first year Ph.D student, and his research interests are in electrochemical energy storage and CO2 reduction. Outside of the lab, Lucas enjoys finding new restaurants to eat at, playing board games with friends, and spending time outside.

Nicole Llewellyn

Bridge-to-PhD Scholar

Nicole L

Nicole grew up in Rochester, NY and graduated with a B.S. in chemical engineering from Syracuse University. As a scholar in the Bridge to the PhD Program in STEM, a 2-year post-baccalaureate program to prepare students for a PhD, she is researching the electrification of ethylene production from propionic acid oxidation. Outside of lab, Nicole enjoys traveling, baking banana bread, and hiking.

Patrick O. Aghadiuno
Ph.D. student

Patrick & Friends' Graduation

Patrick O. Aghadiuno received his B.S. in Chemical Engineering from Rice University. He is now a Presidential Fellow, Provost Diversity Fellow, and GEM Fellow at Columbia University with a research focus on the development of oxide layers over molecular catalysts within Ensembles of Photosynthetic Nanoreactors for the production of Solar Fuels. Outside of research, Patrick enjoys watching anime, reading mangas, listening to music (Afrobeats, Funk, Gospel), lifting weights, and playing basketball. Patrick is proudly Nigerian-American and cares deeply about the various issues in Africa, especially the energy crisis.

Jingjing Jin
Ph.D. Student


Jingjing grew up in China and received her B.S. in Chemistry from Rutgers University. Her current research interests include water electrolysis and ultrathin membranes. Outside of the lab, Jingjing enjoys basketball, literature, and dancing.  

Kyungmin Yim


Kyungmin grew up in South Korea. He graduated with a B.S. in environmental engineering from Kongju National University. Then he received his M.S. in chemical engineering from Kyung Hee University and Ph.D. in KHU-KIST Converging Science and Technology from Kyung Hee University. In the Ph.D. program, he worked as a researcher at the Hydrogen Fuel Cell Research Center of the Korea Institute of Science and Technology (KIST). He is now researching the proton conducting oxide membrane for water electrolysis. Outside of lab, he enjoys running and reading books.

Dr. Zhexi Lin


Zhexi Lin received his Bachelor of Chemical Engineering from the University of Delaware and his Ph.D. in Chemical Engineering from Columbia University. During his Ph.D. study and prior to joining the Esposito lab, he worked with Prof. Jingguang Chen on the synthesis, characterization, and reactivity evaluation of transition metal carbide, nitride, and oxide model surfaces and powder catalysts using a combination of first-principles calculations, surface science experiments, and synchrotron-based in situ characterization techniques. Zhexi’s current research focuses on electrochemical COconversion and flow cell design. Outside of the lab, Zhexi enjoys listening to classical music and studying philosophy.

Ph.D. and postdoc Alums:

Dr. Xueqi Pang (2022)

Dr. Amanda Baxter (2022)

Dr. Marissa Beatty (2022)

Dr. Anna Dorfi  (2020)

Dr. Jack Davis (2019)

Dr. Prof. Xiangye Liu (2019)

Dr. Natalie Labrador (2018)

Dr. / Prof. Glen O’Neil (2018)