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High-Throughput Approach for Minimum Energy Pathway Search Using the Nudged Elastic Band Method with Efficient Data

Heejune Park1, Benjamin P Pritchard2, Lee-Ping Wang1

  • 1Department of Chemistry, University of California Davis, Davis, California 95616, United States.

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Summary
This summary is machine-generated.

This study introduces a high-throughput computational approach to accelerate chemical reaction pathway mapping using the Nudged Elastic Band (NEB) method. The enhanced workflow significantly improves efficiency and convergence rates for complex reaction calculations.

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Area of Science:

  • Computational Chemistry
  • Chemical Physics
  • Materials Science

Background:

  • The Nudged Elastic Band (NEB) method is essential for mapping chemical reaction pathways but is computationally demanding.
  • Understanding the impact of protocol variations on NEB performance is challenging due to its complexity.

Purpose of the Study:

  • To develop and test a high-throughput computational approach to enhance the efficiency of the NEB method.
  • To parallelize single-point energy and gradient calculations and store results in a database for better data management.
  • To evaluate the performance of different NEB protocols and band force types.

Main Methods:

  • Developed a high-throughput approach using QCFractal and geomeTRIC on the QCArchive infrastructure.
  • Parallelized single-point energy and gradient calculations, storing results in a database.
  • Tested various NEB parameters, including three band force types (conventional NEB, hybrid band, plain band) and different levels of theory (DFT, PM7).
  • Optimized reactions from RGD1 dataset and 118 diverse chemical reactions from literature datasets.
  • Compared convergence rates and final transition state structures with reference data.

Main Results:

  • The high-throughput approach successfully parallelizes NEB calculations and stores results efficiently.
  • The hybrid band protocol demonstrated consistently higher convergence rates compared to the conventional NEB method across various datasets.
  • Tested protocols showed reliability and correctness, reproducing previous results for transition metal catalyst reactions.

Conclusions:

  • The developed high-throughput approach significantly enhances the efficiency of NEB calculations for mapping chemical reaction pathways.
  • The hybrid band method offers improved convergence rates, making it a valuable alternative for NEB calculations.
  • This work provides a robust and scalable framework for computational studies of chemical reactions.